PSYC 1010 Lecture Notes - Lecture 9: Slow-Wave Sleep, Delta Wave, Alpha Wave

• School: York University
• Department: Psychology
• Course: PSYC 1010
• Professor: Jill Bee Rich

Document Summary

Place electrodes on the person to measure small electrical activity in the brain, etc. Amplitude in volts, frequency is hertz (hz) Before stage 1: low voltage, high frequency beta waves. Stage 1 (5%: sleep is very light, hypnagogic state almost asleep but not quite. Stage 2 (50%: sleep spindles and mixed eeg activity. Slow wave sleep (stages ) (14%: low frequency, high altitude (delta waves) It is noted that stage 4 is the deepest stage of sleep. Sleep serves as a restorative function: slow wave sleep in the restorative process, growth hormones released in sws. Sleep is viewed as part of the circadian rhythm that has developed via evolution. Feeling sleepy at night is programmed to enhance inactivity and survival. Complete sleep deprevation: absolutely no sleep at all. Partial deprivation (sleep restriction: not getting enough sleep over a long period of time, has particular negative effects with less than 5 hrs sleep/night.