Flashcards in Nature of Sleep Deck (7)
How are circadian rhythms controlled?
By the SCN and fine-tuned by exogenous zeitgebers
What happens during sleep during the night?
We do through 5 cycles, each one lasting about 90 minutes with REM increasing during the night
How are the different stages and cycles of sleep distinguished?
Through EEG (brain waves) as frequency and amplitude differs
Name 2 main differences in sleep among species
1) Time spent sleeping varies
2) REM absent in some like reptiles
Name 2 things suggested about sleep
1) It is necessary for survival otherwise why would all animals do it?
2) Patterns of sleep are adaptive to each particular species otherwise why are the patterns so different?
Explain a positive evaluative point about the nature of sleep
Objective evidence from EEG readings providing objective measures of sleep