After cutting each of the individual tracts that enter the medulla and spinal cord, depriving the brain of almost all sensory input, an animal:
A) continues to have periods of wakefulness and sleep.
B) stops sleeping.
C) goes into a coma.
D) enters a prolonged state of sleep.

Question

Quizplus · Accepted Answer

The brainstem, including the medulla, contains structures that regulate basic functions such as sleep-wake cycles. Even with sensory deprivation, these intrinsic mechanisms can maintain wakefulness and sleep cycles.

After Cutting Each of the Individual Tracts That Enter the Medulla