Antagonist/ Fixator/ Prime Mover/ Synergist

Antagonist

Reverses and/or opposes the action of a prime mover

Fixator Muscle Definition

A muscle that serves as a stabilizer of one part of the body during movement of another part.

Prime Mover

Agonist

Prime Mover Muscle Definition

Agonists are also interchangeably referred to as "prime movers," since they are the muscles considered primarily responsible for generating or controlling a specific movement.

Fixator

Immobilizes the origin of a prime mover

Synergist

Performs the same movement as the prime mover

Fixator

Postural muscles for the most part

Synergist

Stabilizes a joint so that the prime mover can act at more distal joints

Antagonist Muscle Definition

a muscle that opposes the action of another

Synergist Muscle Definition

an organ (as a muscle) that acts in concert with another to enhance its effect