The supraspinatus is named for its location on the posterior aspect of the scapula above the spine.What is its action?
A)to flex and adduct the humerus and to act as a synergist of the pectoralis major
B)to stabilize the shoulder joint and help prevent downward location of the humerus and to assist in abduction
C)to extend and medially rotate the humerus and to act as a synergist of the latissimus dorsi
D)to help hold the head of the humerus in the glenoid cavity and rotate the humerus laterally

Question

Quizplus · Accepted Answer

The supraspinatus muscle is responsible for stabilizing the shoulder joint and preventing downward location of the humerus. It also assists in abduction of the arm. It does not flex or adduct the humerus, extend or medially rotate the humerus, or act as a synergist of the pectoralis major or latissimus dorsi.

The Supraspinatus Is Named for Its Location on the Posterior