Sleep Stages Notes
2
Name: ______________________________________________ Pd:____ Date:________________________ SLEEP STAGES Stage 1 Light sleep; Fantastic images resembling hallucinations Body relaxes; Hypnogogic sensations: falling, floating Irregular and small brain waves 5 minutes Stage 2 Relax more deeply Sleep spindles – bursts of rapid, rhythmic brain wave activity Can be awakened without too much difficulty Clearly asleep; Garbled sleep talking is possible 20 minutes Stage 3 Transitional stage Brain begins to emit delta waves (large slow waves associated with sleep) Few minutes Stage 4 Continual delta waves; Stages 3 and 4 termed slow- wave sleep Sleep-walking, bed-wetting, night terrors REM After Stage 4 goes back to stage 3, then 2, then REM (Rapid Eye Movement) Dream here Heart rate rises, rapid and irregular breathing, eyes dart around, genital arousal, brain waves rapid and saw-toothed Motor cortex is active, but brainstem blocks it messages Muscles EXTREMELY relaxed and little movement Cannot be easily awakened Termed paradoxical sleep as internally body is aroused while externally appears calms 10 minutes Sleep cycle repeats itself about every 90 minutes As Stage 4 sleep gets progressively briefer and then disappears, REM sleep period gets longer.
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Sleep Stages Notes
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Name: ______________________________________________ Pd:____Date:________________________SLEEP STAGESStage 1 Light sleep; Fantastic images resembling hallucinatins!d" rela#es; $"pnggic sensatins: %alling& %lating'rregular and small brain (a)es* minutesStage + ,ela# mre deepl"Sleep spindles - bursts % rapid& rh"thmic brain (a)e acti)it".an be a(a/ened (ithut t much di%%icult".learl" asleep; Garbled sleep tal/ing is pssible+0 minutesStage 1 Transitinal stage!rain begins t emit delta (a)es 2large sl( (a)es assciated (ith sleep3Fe( minutesStage 4 .ntinual delta (a)es; Stages 1 and 4 termed sl(5(a)e sleepSleep5(al/ing& bed5(etting& night terrrs,E6 A%ter Stage 4 ges bac/ t stage 1& then +& then ,E6 2,apid E"e 6)ement3Dream here$eart rate rises& rapid and irregular breathing& e"es dart arund& genital arusal&brain (a)es rapid and sa(5tthed6tr crte# is acti)e& but brainstem blc/s it messages 6uscles E7T,E6EL8 rela#ed and little m)ement.annt be easil" a(a/enedTermed parad#ical sleep as internall" bd" is arused (hile e#ternall" appears calms10 minutes Sleep c"cle repeats itsel% abut e)er" 90 minutes As Stage 4 sleep gets prgressi)el" brie%er and then disappears& ,E6 sleep perid gets lnger:http:;;(((:sleepde#:rg;images;brain(a)e:
