PSY 111 Lecture Notes - Lecture 14: Delta Wave, Theta Wave, Sleep Paralysis
1 Dec 2020
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Document Summary
Brain"s electrical activity mostly beta waves (high frequency, low amplitude) while awake. Alpha waves (lower frequency, slightly higher amplitude) while relaxed and frowsy. Stage 1 theta waves a form of light sleep from. Lasts a few minutes, can be easily awakened. People experience images and sudden body jerks. Stage 2 sleep spindles in brain-wave activity indicate transition to stage. Stage 3 regular appearance of slow and large delta waves. Stage 4 delta waves dominate brain wave activity. Within 60-90 minutes of falling asleep, stages proceed through 1-2-3-4-3-2. Rem sleep periods of sleep involving rapid eye movements. Periods of rem comes following stage 2 sleep. Rem sleep paralysis brain sends signals to make voluntary muscle movements. Dreams can occur during non-rem sleep, but not as vivid more difficult. Body is highly aroused, but little or no muscle movement. Newborns began by sleeping 16 hours a day, almost half in rem. Both genetics and environment can affect length of sleep.
