PSYCH 3M03 Lecture Notes - Lecture 8: Locus Coeruleus, Sympathetic Nervous System, Parasympathetic Nervous System
24 Dec 2015
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Under aroused: poor performance, low affect, motivation to do something. Over arousal: performance impairments, unpleasant, motivation to become less aroused. Catecholamines are critical for central nervous system arousal (e. g. cocaine, ritalin) >> increased. Dopamine: relates directly to mood emotions and drives (substancia nigra and vta >> mfb >> activity levels, blocked sleep limbic system >> cortex) Norepinephrine: ^ also (locus ceruleus >> mfb >> limbic system >> cortex) With time can lead to irritability , decreased attention, decreased heart rate and blood pressure, poor performance. Professions where there is low arousal >> problems getting form low arousal to a state of good performance rapidly. Surprise: when sleep was sufficient people would wake, extreme boredom and unpleasantness, visual and auditory hallucination, couldn"t perform on simple tests, all demanded to leave. Stereotyped facial expressions: mouth open, eyes agape, ears perked. Sky diving stress level increases, rises in adrenaline, sns levels) Parasympathetic nervous system activation gradual reduction of sympathetic nervous system.
