PSYCH261 Lecture Notes - Lecture 9: Fatal Familial Insomnia, Bottlenose Dolphin, Hypnagogia
25 Aug 2016
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Document Summary
Urge to sleep will come eventually no matter what. 90 min cycles alternation of rem and non-rem sleep. 4 to 5 hours of rem in an 8h night. Prefrontal cortex: low activity in this region during rem; reflects the lack of organization and planning that occur in dreams. Extrastriate cortex: high activity in this region during rem; reflects visual hallucinations during dreaming. Striate cortex: low activity in this region during rem due to lack of visual input. Bottlenose dolphin: sleeps one hemisphere at a time. Effects of sleep deprivation decreased attention, speed of processing, sometimes hallucinations; problems concentrating chronic sleep deprivation can lead to serious health problems (increased risk of obesity, cardiovascular diseases, diabetes) More mental activity does lead to greater sws facilitates learning. Functions of rem sleep promote brain development facilitates learning. More time spent in rem and sws after being deprived of sleep.
