Ordinarily, people do not walk or otherwise act out their dreams during REM sleep because REM sleep is associated with

A) relaxation of the major muscles.
B) decreased brain activity.
C) low and steady heart rate and breathing rate.
D) temporary loss of memory for motor skills.

Motor Skills

The abilities required in order to perform movements and tasks, involving the coordination of muscles and limbs.

Brain Activity

The complex functions and processes occurring within the brain, including neural activity and the coordination of cognitive, sensory, and motor functions.