PSY BEH 11A Lecture Notes - Lecture 16: Beta Wave, Alpha Wave, Sleep Deprivation
2 Nov 2016
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Document Summary
Sleep: eeg data let one distinguish distinct stages of sleep. Alpha rhythm: regular waves in the frequency range, strongest in eeg of one who is relaxed with eyes closed. Beta rhythm: observed when a person is actively thinking and/or moving. Slow-wave sleep (stages 3 and 4: heart rate, breathing rate, and brain activity are reduced. Sleep across life span infants: lots of sleep, especially rem: elderly: less, considerable variation from one person to the next. Our bodies repair themselves or restore substances used up while we are awake for example, physical fatigue leads to longer periods of slow-wave sleep: neurons reset their activity levels or consolidate connections made during the day. Sleep may allow neurons to calm down after a day"s activities. Memory consolidation: neural activity during both slow-wave and rem sleep helps to consolidate memories gained during the previous day.
