When extending the forearm
A) the triceps brachii is the prime mover, and the brachialis is the synergist.
B) the triceps brachii is the synergist, and the brachialis is the prime mover.
C) the triceps brachii is the prime mover, and the brachialis is the antagonist.
D) the triceps brachii is the antagonist, and the brachialis is the prime mover.

Question

Quizplus · Accepted Answer

The triceps brachii is the prime mover in forearm extension, while the brachialis, which primarily acts in forearm flexion, serves as the antagonist in this action.

When Extending the Forearm