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PSY 212
Chapter 15: Sleep
Term | Definition |
---|---|
sleep | behavior, includes several stages of sleep |
EEG | to monitor neural activity |
EMG | to monitor changes in muscle tone in different regions of the face |
EOG | to monitor eye movements during different stages of sleep |
stages of sleep | stage 1, stage 2, stage 3, stage 4, REM sleep |
beta waves | 13-30 Hz desynchronous waves that signify wakefulness and alertness |
alpha waves | 8-12 Hz waves that signify restfulness and decreased neural activity (often with eyes closed) |
theta activity | stage 1 sleep; relatively low frequency waves that are synchronized—transition between sleep and wakefulness |
stage 2 sleep | irregular firing patterns containing K complexes (high amplitude, low frequency) and sleep spindles (low amplitude, high frequency) |
stage 3 sleep | delta wave (slow-wave sleep) sleep signified by high-amplitude, low frequency waves (deep sleep; slow-wave sleep) |
stage 4 sleep | similar to stage 3 sleep, but the delta (slow-wave sleep) activity increases from 20-50% to 50% |
REM sleep | rapid eye movement, composed of theta activity and beta waves, being awakened from REM sleep will guarantee that you will at least partially remember the dream you were having |
circadian rhythm | the one that is a day in length |
melatonin | a hormone that induces sleepiness |
insomnia | inability to sleep or to obtain adequate-quality sleep, to the extent that the person feels inadequately rested |
narcolepsy | a disorder in which individuals fall asleep suddenly during the daytime and go directly into the REM sleep |
cataplexy | extreme muscle weakness/paralysis that occurs spontaneously and lasts several minutes while the person is conscious |
sleep deprivation | sleep dept.; long periods without sleep are never made up in their entirely |
sleep attacks | occur spontaneously at inappropriate times and last 2-5 minutes |
sleep paralysis | inability to move immediately before or after sleep |