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305 Cards in this Set

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