What Term Best Describes the Relationship Between the Pronator Quadratus

Question

What term best describes the relationship between the pronator quadratus and supinator?
A) Fixators
B) Antagonists
C) Synergists
D) Prime movers
E) Depressors

Accepted Answer

Pronator quadratus and supinator are antagonistic muscles, meaning they perform opposite actions. Pronator quadratus pronates the forearm (rotates it medially) while supinator supinates the forearm (rotates it laterally). Therefore, they cannot be synergists or prime movers working together to produce the same action. They are also not fixators or depressors as they do not act to stabilize a joint or lower a body part, respectively.