A reference to moving away: An artery is an efferent vessel carrying blood away from the heart while an efferent nerve carries impulses away from the central nervous system.

Any of the motor nerve fibers that transmit impulses from the central nervous system to the intrafusal fibers (the striated fibers within a muscle spindle or a stretch receptor) of the muscle spindle.

The gamma efferent fibers are responsible for deep tendon reflexes, spasticity (increased tone of a muscle), and rigidity, but not for the degree of contractile response. They function in regulating the sensitivity of the spindle and the total tension of the muscle.