The deepest sleep, and the one from which it is hardest to be awakened, is
A)Stage 1.
B)Stage 4.
C)the hypnagogic state.
D)REM sleep.

Name: The deepest sleep, and the one from which it is hardest to be awakened, is A)Stage 1. B)Stage 4. C)the hypnagogic state. D)REM sleep.
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Question

Quizplus · Accepted Answer

Stage 4, also known as delta sleep, is the deepest stage of non-REM sleep in which brain waves are slowest. It is the most difficult stage to be awakened from and is associated with physical restoration and rejuvenation.

The Deepest Sleep, and the One from Which It Is