Vivid Dreams Can Occur During REM Sleep

Multiple Choice

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.