lowered heart rate, muscle tension and temperature. Easy to wake people from it
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Stage 2
slower and larger EEG waves, some quick bursts of high frequency waves called sleep spindles
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Stage 3
even longer slower waves
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Stage 4
largest waves, low metabolic rate
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Repeating the stages
reverses through 3,2 then 1
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Evolutionary theory
Webb- sleep occurs most when resources are hard to come by(similar to hibernation. Meddis- sleep keeps them safe, dud to not attracting the attention of predators. small, hunted animals sleep more than predators
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Restoration theory
Oswald- non-rem is for physical resotarion whilst rem is for brain. Horne- two different types of sleep, core which is made up of stage 4 SWS for body rest and REM for brain and optimum sleep which is the other stages this is not necassary sleep
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Effect of age
babies:20hrs adults:7/8 over50:6 baies more rem
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Other cards in this set
Card 2
Front
Stage 1
Back
lowered heart rate, muscle tension and temperature. Easy to wake people from it
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