The muscle group that helps the prime movers and protects from unwanted movements are known as synergists.
Muscles are the mass of loose tissues that mediate the movement of the entire body as well as the internal organs. There are three types of muscles in human body: skeletal muscles, smooth muscles and cardiac muscles. The skeletal muscles are voluntary in nature while the smooth and cardiac muscles are involuntary.
Synergists are called as the fixator muscles. They perform their function on movable joints. They are also called neutralizers because the neutralize the functions of agonist muscles. For example, brachioradialis and brachialis act as the synergists when flexing of the forearm is done.
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