At 3 o'clock in the morning,John has already slept for 4 hours.As long as his sleep continues,we can expect an increasing occurrence of

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Quizplus · Accepted Answer

REM sleep typically occurs after a few hours of sleep, and as John has already slept for 4 hours, we can expect an increasing occurrence of REM sleep. Hypnagogic sensations occur during the transition from wakefulness to sleep, while muscle tension and NREM-3 sleep may occur earlier in the sleep cycle.

At 3 O'clock in the Morning,John Has Already Slept for 4