Which of the following muscles produce upward scapular rotation when the shoulder girdle is elevated from 90° to 180°?
A) Deltoid and rotator cuff muscles
B) Upper trapezius,lower trapezius,and serratus anterior
C) Upper trapezius and serratus anterior
D) Teres major and teres minor

Question

Quizplus · Accepted Answer

The upward rotation of the scapula is largely due to the coordinated action of the upper and lower trapezius and serratus anterior muscles. These muscles work together to upwardly rotate the scapula and stabilize it against the thoracic wall during arm elevation. The deltoid and rotator cuff muscles are involved in arm elevation, but do not have a major role in scapular rotation. The teres major and minor do not contribute to scapular rotation at all.

Which of the Following Muscles Produce Upward Scapular Rotation When