REM sleep becomes possible when the
A. reduced activity of the locus coeruleus and raphe nuclei disinhibits the rostral pontine reticular formation.
B. increased activity of the locus coeruleus and raphe nuclei stimulates the rostral pontine reticular formation.
C. increased activity of the locus coeruleus and raphe nuclei inhibits the rostral pontine reticular formation.
D. decreased activity of the rostral pontine reticular formation stimulates the locus coeruleus and raphe nuclei.
Answer: A
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