The best outward indicator of REM sleep is:
A) a combination of rapid eye movements and tense muscles
B) snoring
C) loss of muscle tone (temporary paralysis)
D) slow, deep breathing

Question

Quizplus · Accepted Answer

The best outward indicator of REM sleep is the loss of muscle tone, also known as temporary paralysis, except for the eye muscles and those responsible for breathing. This prevents us from acting out our dreams. Rapid eye movements are characteristic of REM sleep, but the loss of muscle tone is a more definitive outward indicator.

The Best Outward Indicator of REM Sleep Is