Which of the following may prevent the sleeping brain from being aroused by external stimuli, thus, marking the true boundary of sleep?
A)alpha waves
B)beta waves
C)sleep spindles
D)a hypnic jerk

Question

Quizplus · Accepted Answer

Sleep spindles are sudden bursts of brain activity that occur during stage 2 of the sleep cycle. They are thought to represent a mechanism that keeps the brain in a state of sleep by blocking external sensory information, thus preventing the sleeper from being aroused by external stimuli.

Which of the Following May Prevent the Sleeping Brain from Being