PSYCH 202 Lecture Notes - Lecture 13: Slow-Wave Sleep, Reticular Formation, Sleep Deprivation
Document Summary
Each sleep cycle is about 90 minutes. Sleep is important for: memory consolidation, brain development, energy conservation, body restoration. Infants: 16-17 hours a day sleeping; a lot of time in rem sleep for brain development. Irritable, groggy, impairs cognition, impairs task & perceptual learning, impairs memory, not healing (immune system), hallucinations & perceptual distortions. Deprivation leads to rebound: go through stages 1 & 2 very quickly and spend longer in slow-wave sleep and rem sleep. Reticular formation (long pair of nuclei running through brain stem) Sends norepinephrine to forebrain and stimulates forebrain, then rest of cortex to keep brain awake and alert. Where we find the slow wave sleep generator. Send inhibitory feedback to reticular activating system etc) Controls rem sleep (rapid eye movement, inhibition of spinal motor activity, Acetylcholine comes out of pons and controls these behaviors^ Maintains control of inhibition circuits; either reticular activating system or forebrain or pons.
