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37 Cards in this Set
- Front
- Back
Sympathetic Nervous System
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division of autonomic nervous system that prepares the body for activity or to cope with a stressor "Fight or Flight"
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Parasympathetic Nervous System
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division of autonomic nervous system that oversees digestion, elimination, and glandular function, "Resting and Digesting"
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Peripheral Nervous System
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portion of system consisting of nerves and ganglia that lie outside the brain and spinal cord
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Histamine
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Promotes wakefulness in posterior hypothalamus
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Acidosis
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State of abnormally high hydrogen ion concentration in the extracellular fluid
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Alkalosis
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State of abnormally low hydrogen ion concentration in the extracellular fluid
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Central Nervous System
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Brain and Spinal Cord
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Spinal Cord
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Bundle of nervous tissue that runs from the brain to the 1st-3rd lumbar vertebrae and provides a conduction pathway to and from the brain
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Pons
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part of brainstem connecting the medulla with the midbrain, providing linkage between upper and lower levels of the CNS
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Lobes of the Brain
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Frontal
Cerebral Parietal Temporal Occipital |
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Neurotransmitter
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Chemical messenger released by neurons that may. upon binding to receptors of neurons or effector cells, stimulate or inhibit those neurons or effector cells
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Synapse
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Functional junction or point of close contact between two neurons or between a neuron and an effector cell
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Neuron
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cell of the nervous system specialized in generating or transmitting electrical signals (action and graded potentials)
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Sleep Spindles Result From:
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Blocking of information between the thalamus and cortex result from deactivation of the Reticular Activating System (RAS)
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Reticular Thalamic Nuclei
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promotes spindles and sleep preservation in the brain
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Alertness is linked to:
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Body Temperature
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3 Things the Circadian Rhythm Influences
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1) Body Temperature
2) Hormone levels 3) Potassium (K) levels |
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Serotonin
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promotes wakefulness in ascending reticular activating system (RAS)
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Internal Clock
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Zeitgebers
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Dorsal Raphe Nucleus Discharge
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Slowly in NREM, absent in REM
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Controls Circadian Rhythm
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Superchiasmatic Nucleus (SCN)
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Pontine Saccade Generators
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Rapid Eye Movements
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PGO
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Pons
Occipital Cortex Geniculate Nucleus of the Thalamus |
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Lateral Geniculate Nucleus
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PGO waves
Cortex |
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Acetycholine
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promotes wakefulness and REM (on cholinergic neurons)
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4 Things PGO Triggers
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1) Muscle Twitches
2) Eye Movements 3) Changes in respiration 4) Changes in HR |
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Gateway Structure Between Body and Cerebral Cortex
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Thalamus
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Seizures occur most in what area of the brain?
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Temporal Lobe
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Lateral Tegmenteoreticular Tract
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responsible for muscle atonia
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Part of brain when stimulated produces sleep onset
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Nucleus Tractus Solitarius
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Pineal Gland
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Where melatonin is released
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Effectors
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Impulses sent via motor neurons to muscles
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2 Medications that Facilitate GABA
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Barbituates
Benzodiazepines |
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Caffeine Blocks in the Anterior Hypothalamus:
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adenosine receptors
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The Anterior Hypothalamus Secretes
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GABA
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5 Anatomical Sites that Control NREM Sleep (BRAND)
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1) Basal Forebrain Area
2) Reticular Thalamic Nuclei 3) Anterior Hypothalamus 4) Nucleus Tractus Solitarius 5) Dorsal Raphe Nucleus |
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Generator of Wakefulness
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Ascending reticular activation system
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