Sleep Stages
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Last updated 1:20 AM on 10/1/25
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7 Terms
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Stage 1
Transition from wakefulness to sleep. 1-7 minutes.
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Hypnic Jerks (Positive Myoclonus
Reflex muscle contraction throughout the body
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Stage 2
Beginning of true sleep, person become disengaged from surroundings.
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Stage 3 & 4
Slow-wave sleep(SWS, Delta sleep) Physiological functions slow significantly, becomes difficult to awaken.E
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EEG Pattern Stage 2
High freq. Bursts of brain activity sleep spindles.
Theta Waves, K-complexes.
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EEG Pattern Stage 3 & 4
Delta Waves
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EEG Pattern Stage 1
Beginning of Theta waves.
Note 
Flashcards (43)