PSYCH 1101 Lecture Notes - Lecture 13: Sleepwalking, Sleep Paralysis, Narcolepsy
23 Sep 2016
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How much do we sleep: on average we spend about 36% of our lives sleeping. If you live to be 90, that means you spend about 32 years sleeping: most people dream every night. Circadian rhythms: rhythmic cycles corresponding to roughly 24-hour period, endogenous. On this 24 hour cycle regardless of external stimuli: circa (about) dies (day) About: humans tend to have cycles that are slightly longer than 24 hours: people sequestered without clocks or windows go to bed a bit later and wake up a bit later each day. Earlier estimates were that we were on 25 hour cycles but this was confounded by letting participants regulate the lights in their sequestered room. Eeg (electroencephalogram: electrodes placed on the scalp provide a gross record of the electrical activity of the brain, recordings are a rough index of psychological states. Characterized by an increasing percentage of slow, irregular, high- amplitude delta waves. No dreams, hard to wake you: cycle back.
