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10 Cards in this Set
- Front
- Back
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acetylcholine
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neurotransmitter
mediates memory, neuromuscular transmission & parasympathetic arousal Alzheimer's = loss of acetylcholine receptors in cortex & hippocampus Parkinson's relative excess of acetylcholine |
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age & sleep
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patterns vary with age. increased age, total sleep time, State 4 & REM sleep decrease
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agnosia
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inability to recognize familiar sensory stimuli (auditory, visual, tactile)
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akathesia
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sensation of motor restlessness
inability to sit still |
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akinesia
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slowness or loss of movement (bradykinesia); mask like facial expression & emotionless speech
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all-or-none law
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biological law governing the action potential. proposes that an action potential will occur when the neuron receives a minimal level of stimulation; stimulation beyond that level does not affect the size or speed of the action potential
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alpha waves
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pattern of electrical brain activity associated with relaxed wakefulness
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amygdala
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substructure of the limbic system involved in the control of emotional activities including the attachment of emotions to sensory stimuli, fear conditioning, & learning about rewards & punishments
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androgens
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male sex hormones
testosterone androstenedione |
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anhedonia
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lack of reaction to pleasurable stimuli
inability to experience pleasurable sensations |
