Which of the following characteristics describe stage 2 non-REM sleep? Select all that apply
A)
It occurs at the onset of sleep and lasts approximately 7 minutes.
B)
During this stage, theta waves are primarily seen on EEG.
C)
This stage is known as deep sleep where heart rate and BP are decreased.
D)
This stage has interruptions of spindle activity that helps with integration of new memories.
E)
Muscles of the body are relaxed.
Ans:
B, D
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Stage 2 non-REM sleep lasts approximately 10 to 25 minutes, where on EEG activity includes predominantly theta waves that are interrupted by sleep spindles consisting of bursts of high-frequency (12 to 14 Hz) waves. Answer choice A relates to stage 1 sleep that occurs at the onset of sleep and lasts approximately 7 minutes. Answer choices C and E relate to stages 3 and 4 of non-REM sleep, known as deep sleep where heart rate and BP are decreased and the muscles of the body are relaxed.
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