PSY 102 Lecture Notes - Lecture 6: Suprachiasmatic Nucleus, Circadian Rhythm, Internal Bleeding
7 Dec 2018
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Consciousness: subjective awareness of internal & external events > awake and responsive. If you had a poor sleep: decrease in immune function, confusion, cognitive deficits (won"t be able to pay attention, death in a few days. Theories of sleep : energy conservation: decrease in metabolism, decrease in temperature, decreased heart rate, decrease in respiration. Biological basis of sleep: circadian rhythm: hormone release (melatonin, sleeping/feeding, ~7-10 hours of sleep. Biological basis of sleep: brain regions: suprachiasmatic nucleus (scn) within hypothalamus, sunlight and melatonin can affect the hypothalamus, people with sleep difficulties may take melatonin pills to help with this. Stages of sleep: 5 stages, cycle through ~ 90 minutes, stages 1-4: non-rem (rapid eye movement) sleep, stage 5: rem; vivid dreams, eye movements, different brain waves, measured by electroencephalography (eeg) Stage 4: delta waves, hard to wake. Rem: theta & beta waves, rapid eye movements, easy to wake.
