What is a typical REM and N-REM cycling in humans?
a. ?First half of sleep: N-REM dominates; second half of sleep: REM dominates.
b. ?First half of sleep: REM dominates; second half of sleep: N-REM dominates.
c. ?First half of sleep: only N-REM occurs; second half of sleep: only REM occurs.
d. ?First half of sleep: only REM occurs; second half of sleep: only N-REM occurs.
ANSWER:
a
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