An efferent nerve conveying an impulse that excites muscular contraction.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Examples from the Web for motor nerve
Through repeated performance the muscles, or rather the motor-nerve centers, become habituated to complex activities.The Psychology of Singing|David C. Taylor