A prime mover for flexion of the arm at the shoulder is the
A) pectoralis major.
B) deltoid.
C) latissimus dorsi.
D) coracobrachialis.

Question

Quizplus · Accepted Answer

The pectoralis major muscle is a prime mover for flexion of the arm at the shoulder joint. It is responsible for bringing the arm forward in front of the body. The other muscles listed (deltoid, latissimus dorsi, coracobrachialis) are also involved in shoulder movement, but they are not as important for flexion specifically.

A Prime Mover for Flexion of the Arm at the Shoulder