PSYCH 100 Lecture Notes - Lecture 24: Sleep Spindle, Sleep Deprivation, Rapid Eye Movement Sleep

• School: UMASS-Amherst
• Department: Psychology & Brain Sciences
• Course: PSYCH 100
• Professor: Tammy Rahhal

Document Summary

5 stages measured by differences in brain wave activity. Stage 2 less brain activity hallucination jerking easy to awaken reasonably coherent sleep spindles somewhat easy to wake up. Stage 3 and 4 deep sleep delta waves longer slower peaks hard to wake up. Rem strong brain activity paradoxical sleep when dreams occur increased sexual arousal paralyzed to keep us from acting out in dreams. Rem if we lose rem sleep we make it up first the next time important function as night progresses less deep sleep more rem. Problem: amount of sleep varies for people motivation can overcome cognitive deficits. Sleep deprivation effects irritability mental work suffers immune system. Sleep debt most teens sleep deprived could have serious mental physical problems. 7-8 hours optimal higher mortality rate for those sleeping less than 4 hours or more than 10 more than 10 hours twice as high mortality rate. Paradox when allowed to free run, people sleep 9-10 hours.