what causes a muscle contraction to stop
Muscle Contraction. Muscle fibers contract in response to nerve stimuli from your central nervous system. This is an active process that involves the release of calcium at the cellular level of the muscle fiber, and causes a ratcheting effect that results in the shortening, or contracting, of individual muscle fibers.HARE SHARE TWEET EMAIL. Muscle contraction and relaxation occurs in your body multiple times during the course of a day, especially if you are active. Muscles have fibers, and the fibers are grouped into fascicles, or bundles, which form individual skeletal muscles.