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305 Cards in this Set
- Front
- Back
- 3rd side (hint)
Change in biological & behavioral functioning that occurs over a 24 hour period.
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Circadian Cycle
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Intrinsic process that controls the circadian cycle.
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Circadian Rhythm
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People who are alert in the morning & drowsy & inattentive in the afternoon
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Make better grades in morning classes.
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Larks
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Drowsy in morning, attentive in the afternoon.
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Make better grades in afternoon classes.
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Owls
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Shows circadian cycles of electrical & biochemical activity, controls neural structures responsible for activity.
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Greater activity in the day than in the night, even in diurnal animals. Lesions that separate this from other CNS structures affect the circadian cycle; however, this brain structure maintains its cycle.
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Suprachiasmatic Nucleus (SCN)
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25 hour (or more) sleep-wake cycle that develops in the absence of natural light-dark cycles.
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Free Running Rhythm
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Serve to reset the biological clock every 24 hours.
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Position of the sun, outdoor temperature, etc.
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Zeitgebers
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Seems that broad spectrum light is the zeitgeber that resets our ___ ___.
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Circadian Rhythm
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Detect features of light stimuli & later are analyzed in cortical areas.
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Visual Photoreceptors
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Detect the dusk-dawn cycle.
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Nonvisual Photoreceptors
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Information from the nonvisual receptors travels via the ___ ___ to the ___which is reset by the information.
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Retinohypothalamic Tract; SCN
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SCN influences secretion of ___ by the pineal gland.
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Melatonin
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SCN activity (in response to light) ___ melatonin release; lack of SCN activity (in response to dim light) ___ release.
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Inhibits; Increases
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Promotes sleep.
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Alters the circadian pacemaker.
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Melatonin
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A form of depression caused by reduced daylight during the winter months.
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Seasonal Affective Disorder (SAD)
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___ therapy is used to treat SAD.
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Light
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Regulate circadian rhythm.
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Found in mice & Drosophila (fruit fly)
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Clock Genes
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A schedule that shortens the day by requiring a worker to start on the late shift & then rotate to an earlier shift the following week.
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Phase-Advance Shift
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A schedule that lengthens the day by requiring a worker to rotate to a later shift each week.
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Phase-Delay Shift
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A ___ shift results in greater job satisfaction, fewer health problems, etc.
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Phase-Delay
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A ___ shift is associated with less job satisfaction, more health problems, etc.
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Phase-Advance
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Jet lag is worse when the traveler is going from ___ to ___ (phase-___).
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West; East; Advance
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Jet lag is less when the traveler is going from ____ to ____ (phase-____).
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East; West; Delay
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Tips to avoid jet lag include (3):
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Modifying diet
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Use of bright light & melatonin
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18-24 Hz low voltage desynchronized activity.
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Alert.
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Beta Activity
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8-12 Hz larger more synchronized activity
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Relaxed
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Alpha Activity
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1-4 Hz larger more synchronized activity
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Sleep.
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Delta Activity
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A network of nuclei & pathways beginning in the hindbrain & extending through the midbrain.
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Consists of as many as five specific cell groups.
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Recticular Activating System
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Produces cortical activation.
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Reticular Activating System
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RAS isolated from cortex
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Constant sleep.
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Cerveau Isolé Preparation
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Less RAS isolation.
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Normal sleep cycles.
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Encephalé Isolé Preparation
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Involved in control of cortical activity, behavioral alertness, & REM sleep.
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Transmitter substance is NE.
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Locus Coeruleus
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Sleep research is conducted using ___ recording of the cortical EEG.
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Macroelectrode
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Characterized mostly by theta activity (waves with a frequency of 4 to 7 Hz).
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Light sleep
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Stage 1
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Theta activity plus sleep spindles (bursts of 12 to 14 Hz activity),
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And k complexes (a single large negative wave followed by a single large positive wave).
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Stage 2
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Delta activity (waves of 1 to 4 Hz) is added.
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Stage 3
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Predominately delta waves.
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Stage 4
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The term applied to stages 3 & 4 which consists predominately of slow wave activity.
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SWS (Slow-Wave Sleep)
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EEG patterns resemble the waking state.
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Eyes move behind closed lids & muscle tone is absent.
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Rapid Eye Movement (REM) Sleep
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Also called paradoxical sleep because the brain waves resemble waves that are present in waking patterns of EEG.
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Dreaming is reported during this stage of sleep.
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REM Sleep
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___ ___ may provide the foundation for visual imagery we experience during dreams.
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Begin in the pons, continue to the LGN of thalamus, & end in the occipital cortex.
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PGO Waves
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3 views (functions) of sleep:
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Restorative
Learning & memory Evolutionary |
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Valuable substances manufactured during sleep:
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Growth Hormone
Protein |
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Growth hormones is produced during ___ sleep. Protein synthesis during ___ sleep.
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Deep; REM
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Sleep deprivation produces:
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Tardiness, more feelings of depression, greater daytime sleepiness, impaired cognitive ability & inability to recognize the impairment
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Students without sleep deprivation did not report as many of these symptoms.
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Produces fatigue, lack of concentration, & irritability.
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Produces REM rebound.
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REM Sleep Deprivation
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Produced no severe or permanent impairment.
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Sleep rebound after deprivation with a higher percentage of recovery for stages 3 & 4; suggests they may be important in a restorative function.
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Randy Gardner’s sleep deprivation (11 days)
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May produce microsleep periods.
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Particularly dangerous for truck drivers or other equipment operators.
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3 or more days of sleep deprivation
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People appear to be awake but the EEG indicates stage 1 sleep.
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Microsleep
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___ ___ ___ impairs memory of episodic events.
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REM Sleep Deprivation
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___ increases after training experiences in both animals & humans indicating a role in learning & memory.
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REM
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Sleep evolved to help animals conserve energy when they are less efficient in obtaining resources & to protect them from predators.
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Evolutionary Perspective
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It is at higher levels during infancy & decreases through adulthood.
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It may assist with brain development during infancy.
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REM Sleep
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Total daily sleep ____ with age.
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Decreases
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Children born premature show higher levels of ___.
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Animals with more fully developed brains at birth show less ___ that animals with less developed brains.
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REM
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Located in a thin strip that runs along the midline in the caudal part of the reticular formation.
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Damage to this area produces insomnia.
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Raphé Nuclei
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____ is one of the neurotransmitters in the raphé nuclei.
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Serotonin
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____ agonists enhance sleep.
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____ antagonists decrease sleep, e.g., parachlorophenylalanine (PCPA).
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Serotonin
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It seems the ___ may be involved in activation of the brain.
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Stimulation of this area does not produce sleep.
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Raphé Nuclei
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An area anterior to the hypothalamus.
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Has been shown to induce sleep when stimulated.
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Basal Forebrain Region
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Damage to this area produces sleeplessness.
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This area is also sensitive to temperature (has thermoreceptors) & warming the neurons promotes sleep.
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Basal Forebrain Region
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Research indicates that GABAergic neurons are responsible for sleep induction in this area.
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Basal forebrain region
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___ ___ stimulation significantly reduced REM sleep.
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___ ___ stimulation produced REM sleep rebound post stimulation.
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Locus Coeruleus
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Decreased locus coeruleus activity removes inhibition from the ___ ___ ___ which initiates REM sleep.
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Caudal Reticular Formation
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Dreaming is closely associated with REM but may be controlled by a different brain mechanism ( ___ pathways & by stimulating the ___).
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Dopaminergic; Forebrain
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Associated with a high level of cortical activity & autonomic system arousal at the beginning of a REM period.
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A person is conscious that s/he is dreaming.
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Lucid Dream
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A long term inability to get enough sleep.
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Insomnia
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Taking a long time to fall asleep
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Insomnia
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Frequent waking during the night
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Insomnia
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Awakening before the desired arousal time
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Insomnia
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Contributing factors:
Anxiety & depression |
Contributing factors:
Drugs (stimulants & sedatives or tranquilizers) |
Insomnia
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A sleep disorder characterized by repeated interruptions of sleep caused by the cessation of breathing.
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Sleep Apnea
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Sleep disorder associated with obesity.
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Twice as common in men as in women.
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Sleep Apnea
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May lead to cardiovascular problems & traffic accidents.
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Therapies include weight loss, oral appliances, surgery, & continuous positive airway pressure (CPAP).
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Sleep Apnea
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A sleep disorder characterized by too much sleep.
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Hypersomnia
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Getting out of bed & walking around.
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Occurs in sleep stages 3 & 4.
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Sleepwalking (somnambulism)
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An abrupt wakening from NREM sleep
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Accompanied by intense autonomic arousal & feelings of panic.
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Night Terror (Pavor Nocturnus)
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An NREM sleep disorder characterized by a lack of bladder control during sleep.
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Bedwetting (Nocturnal Enuresis)
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A sudden, uncontrollable sleep attack.
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Usually initiated by monotonous activity.
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Narcolepsy
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Cataplexy, sleep paralysis, &
hallucinations are characteristics of ___. |
Narcolepsy
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A sudden, complete lack of muscle tone.
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Cataplexy
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A brief paralysis that occurs when the individual with narcolepsy is falling asleep or awakening.
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Sleep Paralysis
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There is a genetic connection with this sleep disorder.
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20-40 times higher in first-degree relatives than in the general population.
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Narcolepsy
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Research with canines indicates narcolepsy is caused by a problem with the ___ receptor 2 gene.
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Hypocretin (Orexin)
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A problem with the hypocretin (orexin) receptor 2 gene results in a ___ in hypocretin neurotransmission.
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Deficiency
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Findings indicate that a dysfunction of the ___ ___ may cause an intrusion of REM into the waking state which is experienced as narcolepsy.
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Locus Coeruleus
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Treatment with catecholamine agonists, antidepressants, & hypocretin agonists are proposed as potential therapeutic agents for ___.
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Narcolepsy
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Person will act out a dream.
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Failure of loss of muscle tone during REM allows the person to act out REM actions.
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REM Behavior Disorder (REM Without Atonia)
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Lesions of the dorsolateral pons produce REM behavior disorder in cats via connection to the magnocellular nucleus in the medial medulla.
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Related to Parkinson’s disease & narcolepsy.
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REM Behavior Disorder (REM Without Atonia)
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Damage to the magnocellular nucleus produces REM without atonia & suggests that if the connection between the dorsolateral pons & the magnocellular nucleus is malfunctioning it will lead to ___ ___ ___.
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REM Behavior Disorder (REM Without Atonia)
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Any substance we can take into our body that has the power to change us either functionally or structurally.
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Exert their influence through their actions on the nervous system, particularly the brain & spinal cord.
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Psychoactive Drug
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The study of the effects of drugs on behavior.
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Psychopharmacology
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The study of the ways in which a drug affects the living organism & the organs of the body.
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Pharmacodynamics
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The study of how a drug moves through the body, including the processes of absorption, metabolism, distribution to tissues, & elimination.
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Pharmacokinetics
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The administration of a drug through the mouth.
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The drug dissolves in the fluids of the mouth, esophagus, or stomach & is carried to the intestines, where it is absorbed into the bloodstream.
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Oral Ingestion
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Injection of a drug into a muscle, usually the shoulder, upper arm, thigh, or buttocks.
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Intramuscular (IM) injection
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Injection of a drug through the abdominal wall into the peritoneal cavity (space surrounding major organs).
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Intraperitoneal (IP) injection
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Injection of a drug into a vein.
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Intravenous (IV) injection
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Injection of a drug under the skin.
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Subcutaneous (SC) injection
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Injection of a drug directly into the brain.
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Intracerebral injection
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Injection of a drug into the cerebral ventricles.
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Intraventricular injection
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The administration of a drug through the lungs.
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Inhalation
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The administration of a drug by absorption through the skin or mucous membranes.
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Absorption
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In some cases, drugs can diffuse across ____ ____; in other cases, a drug must cross the ____ ____ ____ in order to produce an effect.
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Cell membranes; Blood-brain barrier
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The speed with which the body ____ a drug is a factor in how long the effect of the drug will last.
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Eliminates
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The amount of time required for the body to eliminate half of a drug.
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Hald-life
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The longer the half-life, the longer a drug continues to have a ____ effect.
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Physiological
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A pattern of drug use that results in negative effects.
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Substance abuse
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The compulsive use of a substance.
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Substance dependence (addiction)
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Changes in the body that produce intense physical symptoms when the drug taking is stopped.
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Physical dependence
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Craving for the way the drug makes the individual feel, for the pleasure &/or relief from discomfort that come from taking the drug.
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Psychological Dependence
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A decrease in the effects of a drug resulting from repeated use.
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Tolerance
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A physical or psychological problem that results from stopping the use of a drug.
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Withdrawal symptoms
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Drug can either ____ or ____ the transmission of neural impulses.
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Facilitate; inhibit
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Drugs that mimic or enhance the activities of a neurotransmitter.
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Agonists
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Drugs that block or inhibit the effects of a neurotransmitter.
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Antagonists
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Drug binds to & activates postsynaptic receptors or increases neurotransmitter effect
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Agonists
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Drug blocks deactivation by blocking degradation or reuptake
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Agonists
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Drug increases neurotransmitter synthesis
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Agonists
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Drug increases neurotransmitter amount by destroying degrading enzymes
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Agonists
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Drug increases amount of neurotransmitter release
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Agonists
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Drug binds to autoreceptors & blocks their activity.
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Agonists
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Drug is a false transmitter, preventing a neurotransmitter from binding to a receptor by attaching to the receptor itself
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Antagonists
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Drug blocks neurotransmitter synthesis
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Antagonists
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Drug causes neurotransmitter to leak from vesicles
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Antagonists
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Drug blocks release of neurotransmitter from presynaptic neuron
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Antagonists
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Drug activates autoreceptors
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Antagonists
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When classifying psychoactive drugs of abuse, the following classifications are used:
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Opioids
Depressants Psychostimulants Psychedelic drugs Marijuana |
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A drug derived from the opium poppy,
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Or a drug that has an action comparable to that of drugs derived from the opium poppy.
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Opioid
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A drug must act on the CNS to produce stupor or sleep-inducing effects to qualify as an ____.
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opioid
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Opioids are ____, used for relief of pain.
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Analgesics
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Natural
Semisynthetic Synthetic |
Opiate classifications
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A natural opiate drug obtained directly from the opium poppy.
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Opium
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Extremely potent natural opioid that is the main alkaloid compound found in opium.
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Morphine
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An alkaloid found in opium that is less potent than morphine.
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Codeine
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Opium, morphine, & codeine are ____ opiates.
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Natural
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Opiates that are combinations of natural opiates & other chemicals.
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Semisynthetic
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A powerful semisynthetic opioid made by reacting acetic anhydride with morphine.
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Heroin
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Opiates that are manufactured in the laboratory.
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Synthetic
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Percodan and OxyContin are ____ opiates.
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Synthetic
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The mechanism of action of opiates ____ agonist.
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Endorphin
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Negative social consequences (illegal status of drug); Highly addictive, with tolerance developing quickly; Withdrawal symptoms are intense & can last several days; Physical dependence (suppression of endorphin production); Psychological dependence (conditioning of withdrawal to the environment).
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Long-term effects of opioid use
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____ symptoms include chills, diarrhea, nausea, & sweating, with tremors & intense cramps occurring during extremely intense ___ that can last for several days.
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Withdrawal (Opioid)
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____ ____ results from the suppression of endorphin production that occurs with repeated use.
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Physical dependence (opioid)
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____ ____ occurs as a result of conditioning of withdrawal to the environment associated with drug use.
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Psychological dependence (opioid)
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A type of psychoactive drug that acts on the CNS to slow down mental & physical functioning.
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Depressant
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A drug that has a calming effect at low doses,
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And a sleep-inducing effect at higher doses.
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Sedative-Hypnotic Drug
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Major types are:
alcohol barbiturate sedative-hypnotics benzodiazepine anxiolytics |
Depressent
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A powerful depressant that strongly influences consciousness & the ability to respond effectively to the environment.
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Alcohol
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Types of alcohol:
Ethyl alcohol (ethanol) ____ (alcohol content = 10% to 14%) ____ (alcohol content = 3.6% to 6.0%) ____ ____ (alcohol content = 40% to 50%) |
Wine; beer; distilled spirits
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The effects of alcohol depend on ____ ____ & the behavioral effects vary from person to person.
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Dose Level
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Because the alcohol concentration of drinks varies, ____ ____ ____ provides an objective measure for examining alcohol’s effects.
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Blood alcohol content (BAC)
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Alcohol affects ____ receptors by enabling ____ to bind more tightly to its receptors.
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GABA A; GABA
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Alcohol produces a(n) ____ effect because the enhanced influence of GABA produces relaxation & decreases anxiety.
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Anxiolytic
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Alcohol disrupts glutamatergic transmission by ____ the NMDA receptor.
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inhibiting
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Continued use of alcohol can lead to a(n) ____ in the number of NDMA receptors which can lead to seizures, delirium, tremors, & neuronal death when alcohol use stops.
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Increase
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Pleasure is also produced by alcohol by the ____ action of alcohol on opiate receptors.
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Agonist
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Alcoholism or alcohol dependence occurs in approximately __ of adult drinkers, in which consumption of alcohol produces physical, mental, and/or social impairment.
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10%
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Repeated use of alcohol leads to ____.
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Tolerance
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____ ____ leads to withdrawal symptoms that range from restlessness to tremors, insomnia, anxiety, mental confusion, & hallucinations.
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Physical Dependence
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____ ____ occurs as a result of conditioning of withdrawal to environments associated with alcohol use.
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Psychological dependence
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Use of alcohol during pregnancy can lead to ____ ____ ____.
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It is characterized by low birth weight & diminished height, distinctive facial features, MR, & behavioral problems.
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Fetal Alcohol Syndrome (FAS)
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A type of sedative-hypnotic drug that is a derivative of barbituric acid.
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Barbiturates
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Barbiturates can be classified as (3):
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Ultrashort-acting, Short-intermediate-acting, & Long-acting
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Take effect within a minute & lasts up to 3 hours.
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Used as anesthetics & include thiopental (Pentothal) & thiamylal (Surital).
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Ultra-Short Acting Barbituates
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Take effect after 15-40 minutes & act for up to 6hours.
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Used as sedatives & include pentobarbital (Nembutal) & secobarbital (Seconal).
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Short-Intermediate-Acting Barbiturates
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Take effect in about 1 hour & last for as long as 16 hours.
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Used as anticonvulsant & include phenobarbital (Luminal).
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Long-Acting Barbiturates
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Have been widely prescribed for the treatment of anxiety disorders.
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Have been shown to effectively reduce anxiety, usually within an hour of administration.
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Benzodiazepines
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They are prescribed for short-term, intermittent use as-needed.
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As anxiety tends to wax & wane, patients with anxiety disorders generally take them when they feel they need them.
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Benzodiazepines
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Long-term, continuous use of the ____is problematic because of the rapid development of tolerance & the high risk of physical & psychological dependence.
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Benzodiazepines
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The core chemical structure of all the benzodiazepines is the fusion of a ____ ring & a ____ ring.
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Benzene; Diazepine
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____ can be classified depending on how rapidly the drug takes to be effective (or how lipid-soluble) & how long the drug continues to act (or its half-life).
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Benzodiazepines
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___ & ___ ___ benzodiazepines are generally used for the treatment of insomnia, while the ___ ___ benzodiazepines are recommended for the treatment of anxiety.
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Short-; Intermediate-Acting; Longer-Acting
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The benzodiazepines bind to the benzodiazepine site of the GABA A receptor, which allows ___ released into the synaptic cleft to bind more effectively & for longer periods of time to the ___ ___.
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GABA; Postsynaptic Membrane
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GABA acts on the ____ GABA A receptor to open up Cl- ion channels, thereby ____ the postsynaptic membrane.
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Postsynaptic; hyperpolarizing
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As GABA is a ____ antagonist, hyperpolarizing the postsynaptic membrane ____ activity in the nervous system.
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Glutamate; decreases
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The ____ effects of the benzodiazepines are mediated by ____ receptors in the locus coeruleus, the amygdala, the hypothalamus, and cingulate cortex.
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Anxiolytic; GABA
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The benzodiazepines produce ____ amnesia, causing the forgetting of events while under the medication’s influence (benzodiazepine midazolam [Versed]).
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Anterograde
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An increased excitement, irritability, hostility, and impulsivity, called ____ ____, occurs in some cases with the benzodiazepines.
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Paradoxical disinhibition
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In rare cases, this can cause extreme cases of rage or violent behavior.
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It is assumed that this occurs as the result of the disinhibition of social constraint.
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Paradoxical Disinhibition
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____ ____ is most likely to be seen in children and the elderly.
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Paradoxical disinhibition
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Drowsiness, dizziness, slurred speech, & decreased alertness & concentration, as well as decreased libido & depression. are common side effects of ____.
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Benzodiazepines
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Benzodiazepines: Injuries especially in the elderly, may result from falling due to ____ ____.
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Reduced coordination
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The high potential of the ____ to be abused limits their use for treating long-standing anxiety disorders.
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Benzodiazepines
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Instead of benzodiazepines, antidepressant ___ & ___ have proven to be very effective not only treating major depressive disorder, but also anxiety disorders that are long-standing (generalized & social anxiety disorder).
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SSRIs; SNRIs
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Because symptom relief occurs slowly after ___ ___ use begins, ___ also would be taken for several weeks until the antidepressants become effective.
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SSRI/SNRI; benzodiazepines
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There is a significant ___ between major depressive disorder & anxiety disorders.
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Comorbidity
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Of individuals diagnosed with a major depressive disorder, __ will be diagnosed with a generalized anxiety disorder & __ with a social anxiety disorder. For these individuals, the ___ not only treat depressive symptoms, but also anxiety.
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15%; 20%; SSRIs
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The ___ are highly additive.
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Barbiturate/benzodiazines
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Tolerance to ___ & ___ develops quickly due to GABA A receptor downregulation, which decreases the number of high affinity GABA A receptors, & thereby, decreases the effectiveness of the ___ & ___.
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Barbiturates; benzodiazepines
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___ ___ to the benzodiazepines makes it difficult for the individual to stop using the drug.
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Physical dependence
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With benzodiazepines, ___ ___ include anxiety, restlessness, insomnia, dizziness, tremors, & seizures.
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Withdrawal symptoms
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With benzodiapepines, ___ ___ occurs a result of conditioning of withdrawal to environments associated with drug use.
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Psychological dependence
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The consumption of ___ with a ___ or ___ can be extremely dangerous.
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Alcohol; barbiturate; benzodiazepine
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When alcohol is taken in combination with either a barbiturate or benzodiazepine, they have a ___ effect.
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Synergistic
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The more alcohol & either a ___ or a ___ are taken together, the worse the interaction, which can cause severe sedation, resulting in mental confusion, a loss of consciousness, & death.
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Barbiturate; Benzodiazepine
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A drug that produces alertness by enhancing the functioning of the sympathetic nervous system & the reticular formation.
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Four types of ___:
amphetamine cocaine caffeine nicotine |
Psychostimulant
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A collective term for psychostimulant drugs typically used to treat ADHD & sleep disorders.
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Amphetamine
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Encompasses three related drugs:
amphetamine or levoamphetamine (Benzedrine), dextroamphetamine (Dexedrine), & methamphetamine (speed) amphetamine. |
Amphetamine
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The most commonly abused amphetamine.
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Methamphetamine (speed)
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Person experiences greater energy, a decreased need to sleep, reduced appetite, & positive affect (mood).
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Amphetamine
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Increases NE & DA release from the presynaptic membrane.
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Blocks the reuptake of both neurotransmitters.
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Amphetamine
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Increases NE & DA availability but only by blocking neurotransmitter reuptake.
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Neural areas involved in arousal & pleasure are affected by the agonistic effects of these drugs.
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Cocaine
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A potent form of cocaine made by mixing cocaine hydrochloride with ammonia or baking soda & water.
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The resulting crystals are smoked in a pipe.
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Crack
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A psychostimulant found in various plants that increases alertness & decreases fatigue.
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Leads to clearer thought processing, reduced drowsiness, more rapid reaction times, enhanced intellectual functioning, & an overall positive feeling.
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Caffeine
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A psychostimulant found in the leaves of the tobacco plant that increases alertness & decreases fatigue.
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Most commonly ingested by smoking cigarettes, cigars, or pipes.
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Nicotine
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A psychostimulant extracted from the leaves of the coca plant that increases alertness, decreases fatigue, & produces a pleasurable emotional state.
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It is an alkaloid compound obtained as white, odorless crystals or crystalline powder.
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Cocaine
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Indirectly increases glutamate release by blocking the inhibitory effect of adenosine.
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It also has an agonistic effect on DA neurons in the prefrontal cortex.
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Caffeine
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Activates cholinergic receptors in both the PNS & CNS.
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Increased DA levels in the CNS account for the reinforcing, psychostimulant, antidepressant, & addictive actions.
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Nicotine
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With psychoactive drugs, ___ ___ leads to withdrawal symptoms that range from:
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A lack of alertness & feelings of lethargy to sleeping for up to 48 hours & depression lasting several days or weeks.
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Physical Dependence
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Frequent or excessive use of amphetamines or cocaine can cause ___ ___ ___,
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which is associated with paranoia (feelings of persecution) as well as delusions & hallucinations.
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Stimulant-Induced Psychosis
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Long –term ___ use can lead to brain damage & motor & cognitive impairment.
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Psychostimulant
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A drug that profoundly alters a person’s state of consciousness.
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Sensational, perceptual, & emotional changes occur as the result.
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Psychedelic Drug (Hallucinogens)
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Peyote, Mescaline, Psilocybin & Psilocin, LSD, PCP, & MDMA
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Psychedelic Drugs
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A psychedelic drug obtained from the peyote cactus plant.
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Peyote
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The psychoactive ingredient in peyote.
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Mescaline
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Psychedelic drugs obtained from fungi (mushrooms).
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Psilocybin & Psilocin
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A powerful synthetic psychedelic drug.
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Acid.
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Lysergic Acid Diethylamide (LSD)
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A powerful synthetic psychedelic drug.
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Angel dust.
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Phencyclidine (PCP)
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A synthetic psychoactive drug that induces a state of consciousness that facilitates communication.
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Ecstasy.
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MDMA
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Perhaps the biggest danger of psychedelic drugs is the ___ of effects.
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Unpredictability
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Flashbacks, or hallucinations, can be experienced long after drug use.
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Psychoactive Drug
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There is no evidence of physical dependence or withdrawal.
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Tolerance occurs with frequent use.
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Psychoactive Drug
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Neurological problems such as memory deficits can occur with ___ use.
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Psychedelic
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A drug obtained from a mixture of crushed leaves, flowers, stems, & seeds of the hemp plant Cannabis sativa.
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Marijuana
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The psychoactive ingredient in marijuana.
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It has been medically used to treat nausea & stimulate appetite.
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THC (Delta-9-Tetrahydrocannabinol)
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Physical dependence leads to withdrawal that include restlessness, irritability, & nausea.
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Tolerance develops with repeated use.
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Marijuana
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Use of ___ leads to a vulnerability to the same types of cancers & respiratory problems as cigarette smokers.
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Psychological dependence leads to craving in environments associated with drug use.
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Marijuana
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Characterized by powerful & long-lasting behavioral changes,
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Including cravings & reward seeking, that can reinstated after long periods of abstinence.
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Addiction
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Addiction occurs to a wide range of situations, which have no common structural features other than contributing to:
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Increased ___ activity in the ___ ___ & other structures in the mesolimbic reinforcement system.
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Dopamine; Nucleus Accumbens
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The high levels of instrumental or operant behavior exhibited when responding leads to activation of reinforcement areas of the brain.
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The part of the CNS that mediates the influence of reinforcement on behavior.
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Mesolimbic Reinforcement System
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Detects whether sufficient motivation is present for voluntary behavior to occur.
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Tegmentostriatal Pathway
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Structures in the ___ ___ play a role in the storage of a memory.
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Nigrostriatal Pathway
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The neural pathway that begins in the lateral hypothalamus, goes through the MFB & ventral tegmental area,
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Terminates in the nucleus accumbens, & governs the motivational properties of reinforcers.
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Tegmentostriatal Pathway
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A structure in the tegmentostriatal reinforcement system that projects to the nucleus accumbens.
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Ventral tegmental area (VTA)
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A basal forebrain structure that plays a significant role in the influence of reinforcement on behavior.
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Nucleus Accumbens (NA)
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A neural pathway that begins in the substantia nigra & projects to the neostriatum & that serves to facilitate reinforcement-
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Induced enhancement of memory consolidation.
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Nigrostriatal Pathway
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The reinforcing properties of cocaine & amphetamines results, in part, from their ability to activate the ___ mesolimbic pathway, including the ___ ___.
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Dopaminergic; Nucleus Accumbens
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Natural reinforcers, such as food & water, cause the release of ___ in the ___ ___.
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Dopamine; Nucleus Accumbens
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Researchers have also found increased dopamine levels in the ___ ___ following the administration of alcohol, marijuana, & nicotine.
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Nucleus Accumbens
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In animals, destruction of ___ ___ in this pathway weakens the reinforcing properties of cocaine & amphetamine.
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Dopaminergic Neurons
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Drugs that block ___ ___ cause animals to reduce or stop behaviors they have been using to obtain cocaine or amphetamine.
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Dopamine Receptors
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Drug experience leads to changes in the structure & function of dopaminergic neurons in the ___ ___.
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Mesolimbic Pathway
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After repeated drug use, the structure of the dopaminergic neurons in the mesolimbic pathway are altered by the ___ of the proteins CREB & c-FOS.
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Upregulation
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The CREB & c-FOS proteins act to increase dendritic branching, to increase the numbers of D 2 receptors, & increase the sensitivity to ___.
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Dopamine
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Changes in the structure & sensitivity of the mesolimbic pathway lead to both ___ & ___ ___.
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Psychomotor; Incentive Sensitization
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___ ___ refers to a drug’s potential to increase motor activity & drug-seeking behaviors after repeated administration.
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Psychomotor Sensitization
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___ ___ is an increase in the incentive value of the drug as well as cues associated with drug use.
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Incentive Sensitization
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Changes in the structure & sensitivity of the ___ ___ allow drug-associated stimuli to elicit drug-seeking behaviors.
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Mesolimbic Pathway
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Individual differences in preference for drugs may reflect differences in ___ ___.
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Mesolimbic Pathways
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___ differences appear to be an important cause of the variability in response to reinforcers, which may explain why some people exhibit a greater potential for substance dependence than others.
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Genetic
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It appears that a defect in the dopaminergic system causes people to abuse certain substances in order to obtain greater stimulation of their ___ ___ ___.
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Dopaminergic Reward System
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The ___ ___ ___ also appears to contribute to compulsive behaviors like pathological gambling, hypersexuality, compulsive eating, & compulsive shopping as well as drug dependency and abuse.
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Mesocortical Dopamine System
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Dopamine ___, such as pramipexole & ropinirole, significantly ___ the likelihood of compulsive behaviors.
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Agonists; Increased
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A gene variation that produces fewer ___ ___ in the mesocortical dopamine system has been found in individuals who engage in compulsive behaviors.
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Dopamine Receptors
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___ is an mu opoid ___ whose effects develop gradually over several hours (rather than producing the “rush” associated with heroin & other opoids) & lasts for about 24 hours.
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Methadone; Agonist
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Methadone also is a glutamate NMDA receptor ___, & thus acts to decrease glutamate neuronal activity.
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Antagonist
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Methadone’s ___ effects on glutamate activity also is thought to contribute to the decreased craving for the opoids.
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Antagonist
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There are significant aversive side-effects of methadone, including:
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Gastrointestinal problems, agitation, insomnia, weight gain, seizures, & memory loss.
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To counter the aversive side-effects, the dosage of ___ can be reduced.
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Unfortunately, the use of ___ often ends as a results of these aversive side-effects.
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Methadone
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Increased sensitivity to pain, agitation, anxiety, gastrointestinal distress, tachycardia, chills, & tremors.
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Methadone Withdrawal Symptoms
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The withdrawal symptoms occurring when methadone is no longer used can lead to the resumption of ___ use.
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The majority of ___ users receiving methadone treatment relapse.
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Many heroin users switch to other drugs such as alcohol, barbiturates, cocaine, or amphetamine when they stop taking methadone.
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Methadone has become an illicit street drug, with the same harmful consequences as ___.
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Heroin
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Naltroxone is a ___ ___ that blocks the same opoid receptors as does heroin & methadone.
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Opioid Antagonist
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Efficacy studies find that ___ reduces cravings for heroin & other opoids.
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Side-effects include gastrointestinal distress, agitation, anxiety, nervousness, restlessness, dizziness, fainting, headache, tachycardia, & seizures that can lead to discontinuance of use.
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Naltroxone
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___ must be taken daily.
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A long-lasting intramuscular form (Vivitrol) is available than is administered once a month.
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Naltroxone
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___ is better tolerated than naltroxone & has been shown to significantly reduce both opoid cravings & opoid consumption.
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Vititrol
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___ works best when combined with the use of behavioral therapies.
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Contingency Management
Cognitive Behavioral Therapy |
Naltroxone
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Disulfiram (Antabuse) blocks the enzyme ___ ___ from breaking acetaldehyde into acetic acid (alcohol is first broken by the liver into acetaldehyde).
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Acetaldehyde Dehydrogenase
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___ is the major cause of a “hangover.”
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Acetaldehyde
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___ increases acetaldehyde level by 5 to 10 times normal & thereby creates a major “hangover” within 5 to 10 minutes after alcohol intake.
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Antabuse
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The negative effects of taking ___ & alcohol include accelerated heart rate, shortness of breath, nausea, vomiting severe headache, & mental confusion that can last up to several hours.
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Disulfiram
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Efficacy studies have found extremely high rates of noncompliance that can be improved by ___ ___ that release disulfiram continuously for up to 12 weeks, or ___ ___of the drug.
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Subdermal Implants; Supervised Administration
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Naltroxone is a(n) ___ ___ that blocks the effects of alcohol-induced endorphins on the ___ ___.
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Opioid Antagonist; Opiate Receptors
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Naltroxone by ___ opiate receptors in the mesolimbic reinforcement system, ___ dopamine release into the nucleus accumbens.
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Blocking; Decreasing
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Efficacy studies find that naltroxone reduced cravings for alcohol & significantly reduced alcohol intake.
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Naltroxone is most effective in patients with either a:
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High level of craving or a strong family history of problems with alcohol use.
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Gastrointestinal distress, agitation, anxiety, nervousness, restlessness, dizziness, fainting, headache, tachycardia, & seizures that can lead to discontinuance of use.
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Naltroxone Side-Effects
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___ must be taken daily.
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___ works best when combined with the use of behavioral therapies (contingency management, cognitive behavior therapy).
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Naltroxone
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A long-lasting intramuscular form of naltroxone is available than is administered once a month.
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It is better tolerated than naltroxone & has been shown to significantly reduce both alcohol cravings & alcohol consumption.
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Vivitrol
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___ (Antabuse) increases dopamine levels in the brain by blocking the activity of dopamine-b-hydroxylase (DBH), which acts to metabolize dopamine.
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The combination of ___ & cocaine raises dopamine to excessive levels, which increases the unpleasant effects associated with cocaine use, such as anxiety & paranoia.
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Disulfiram
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Clinical trials suggests that the use of disulfiram significantly reduced cocaine use.
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The most effective treatment was a combination of ___ & ___ ___ ___.
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Disulfiram; Cognitive Behavior Therapy
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Efficacy studies have found extremely high rates of noncompliance that can be improved by ___ ___ that release disulfiram continuously for up to 12 weeks, or supervised administration of the drug.
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Subdermal Implants
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Modafinil (Provigil), is a weak dopamine ___ ___, which acts to increase dopamine levels in the brain.
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Modafinil also is a glutamate ___ & a GABA ___.
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Reuptake Inhibitor; Agonist; Antagonist
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The FDA has approved ___ only for the treatment of narcolepsy, work shift disorder & obstructive sleep apnea.
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Side-effects are typically not seen, but include blurred vision, dizziness, chills & fever, shortness of breath, rash, & mental confusion.
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Modafinil
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Modafinil is a weak ___ with a low potential for dependency & abuse.
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Stimulant
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The most effective treatment was a combination of modafinil & cognitive behavior therapy.
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Cocaine Addiction
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Clinical trials suggests that the use of ___ significantly reduced craving & cocaine use.
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The mood enhancing effects of ___ are thought to be responsible for its therapeutic effects on cocaine dependency & abuse. It also serves to counteract the effects of cocaine withdrawal.
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Modafinil
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