REM behavior disorder results from
A) too much sleep.
B) not enough sleep.
C) the body not experiencing the typical restriction of movement during REM sleep.
D) deterioration of the medial hypothalamus.
Answer: C
Rationale: A severe and potentially dangerous condition is REM behavior disorder. People with this condition do not show the typical restriction of movement during REM sleep; in fact, they appear to be acting out the content of their dreams.
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