Vivid dreams can occur during REM sleep.What is occurring in our brains to keep us from acting out our dreams?
A) The cortex is unable to process information.
B) Sensory and motor pathways are inhibited.
C) If we begin to move, we switch into a deeper sleep state.
D) Cells are firing action potentials in bursts, which cannot cause muscle activity.
E) The thalamus is continually hyperpolarized.

Question

Quizplus · Accepted Answer

During REM sleep, sensory and motor pathways are inhibited, which keeps us from acting out our dreams. This is thought to be mediated by the brainstem, which sends inhibitory signals to the spinal cord and other motor centers in the brain. This inhibition may be necessary to prevent injury or harm to ourselves and others while we are asleep.

Vivid Dreams Can Occur During REM Sleep