PSYC 1101 Lecture Notes - Lecture 3: Learned Helplessness, Ke Family, Dsm-5
31 May 2016
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Electroencephalograph (eeg): electrodes are placed on the scalp to measure electrical activity in the cortex during sleep. Sleep stages sleep occurs in a repeating pattern of distinct stages that occurs over 90 minutes sleep researchers often combine stages 3 and 4, and thus only conceptualize 3 stages of nrem sleep. Nrem sleep (80%: dreamless sleep, brainwaves on eeg are slow and of high voltage, slowed breathing and heart rate, low bp, sleeper is relatively slow, divided into 4 stages of increasing depth leading to rem sleep. We spend more time in deep, slow-wave (nrem stages 3-4) sleep during the first. 3 hours of sleep (i. e. the first two sleep cycles) Stage 2 nrem and rem mainly occur in the latter half of the night. The length of rem sleep increases the longer you remain asleep and deep sleep decreases; generally have 3-5 rem periods a night. Describe the sleep disorders we discussed in class.
