Twitch

Definition

A twitch is the rapid, brief contraction of a muscle fiber following a single stimulus. It represents the basic unit of muscle force production in response to neural input from the nervous system.

Related terms

Muscle Tension: The force generated by the contraction of muscle fibers.

Action Potential: A rapid rise and subsequent fall in voltage or membrane potential across a cellular membrane due to stimulus.

Motor Unit: A motor neuron and all of the muscle fibers it innervates, working together to produce movement