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.

Question

Quizplus · Accepted Answer

REM sleep is initiated by reduced activity of the locus coeruleus and raphe nuclei, which leads to the disinhibition of the rostral pontine reticular formation. This disinhibition allows for the generation of REM sleep-related neuronal activity, leading to the characteristic features of REM sleep such as muscle atonia and vivid dreaming. Increased activity of the locus coeruleus and raphe nuclei would actually inhibit the onset of REM sleep, making choices B and C incorrect. Choice D is also incorrect, as decreased activity of the rostral pontine reticular formation would not stimulate the locus coeruleus and raphe nuclei.

REM Sleep Becomes Possible When the