PSY 1001 Chapter Notes - Chapter 5: Sedative, Francis Crick, Ernest Hilgard
Document Summary
Circadian rhythm: cyclical changes that occur on a roughly 24-hour basis in many biological processes. Biological clock: term for the area of the hypothalamus that"s responsible for controlling our levels of alertness. Rapid eye movement (rem): darting of the eyes underneath closed eyelids during sleep. Sleep deprivation: causes memory issues, trouble thinking/concentration, mood changes, increased risk for car accidents, weakened immunity, weight gain. Stage 1 sleep: light stage, 5-10 minutes, brain powers down by 50%, produces theta waves, experience hypnagogic imagery. Hypnagogic imagery: scrambled, bizarre, and dreamlike images that flit in and out of consciousness. Alpha waves: 8-12 times per second when quiet and relaxed. Stage 2 sleep: brains slow down more, speed spindles of 12-14 times a second, heart rate slows, body temp decreases, eye movement stops. Sleep spindles: sudden intense bursts of electrical activity. Stage 3/4 sleep: after 10-30 minutes, slow wave (delta) waves. Stage 5 sleep: rem sleep, high frequency, low amplitude waves.
