The main function of teres major is to produce the movements of the humerus at the glenohumeral joint; it pulls the anterior surface of the humerus medially towards the trunk (internal rotation). Furthermore, it can extend the arm from the flexed position.

What is the action of the teres major and minor?

Arm adduction: When working in synergy with teres major, latissimus dorsi and pectoralis major, teres minor adducts the arm from the abducted position (lowers it). The function of this action is to facilitate over-head upper limb movements such as pulling and throwing.

What is the action of teres major quizlet?

medially rotated position, with the hand resting on the posterior iliac crest. of abduction and flexion. as well as adduction and extension of the humerus.