The pectoralis major ________.
A) acts as an agonist in flexion, adduction, and medial rotation at the shoulder
B) is the prime mover in abduction, flexion, extension, and medial and lateral rotation at the shoulder
C) rotates the scapula
D) acts as an agonist in depression and protraction of the shoulder

Question

Quizplus · Accepted Answer

The pectoralis major acts as an agonist (prime mover) in flexion, adduction, and medial rotation at the shoulder. It does not rotate the scapula, nor is it the prime mover in abduction, extension, or lateral rotation at the shoulder. It also does not act as an agonist in depression and protraction of the shoulder.

The Pectoralis Major ________