The prime mover of arm abduction is the ________ muscle.
A) trapezius
B) deltoid
C) latissimus dorsi
D) quadratus lumborum

Question

Quizplus · Accepted Answer

The prime mover of arm abduction is the deltoid muscle. The trapezius muscle helps with scapular elevation and upward rotation, the latissimus dorsi muscle assists with arm extension and internal rotation, and the quadratus lumborum muscle assists with lateral flexion of the trunk.

The Prime Mover of Arm Abduction Is the ________ Muscle