Which of the following is thought to play a role in initiating sleep onset?
A)thalamocortical loop
B)ventrolateral preoptic area
C)factor S
D)all of these

Question

Quizplus · Accepted Answer

All of these have been implicated in initiating sleep onset. The thalamocortical loop regulates sensory processing and is important in transitioning from wakefulness to sleep. The ventrolateral preoptic area in the hypothalamus is believed to be the "sleep switch," as it inhibits arousal-promoting regions in the brain. Factor S is a hypothetical substance that accumulates in the brain over the course of the day and promotes sleep onset.

Which of the Following Is Thought to Play a Role