Question

what type of muscle assists an agonist by causing a like movement or by stabilizing a joint over which an agonist acts?
a) a prime mover
b) an antagonist
c) an agonist
d) a synergist

Explanation:

• A prime mover (agonist) is the main muscle that causes a movement.
• An antagonist muscle opposes the action of the agonist.
• A synergist muscle assists the agonist by causing a similar movement or stabilizing a joint over which the agonist acts.

Answer:

D. a synergist