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What is the movement of the teres major?
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 movement does the teres minor do?
Teres Minor, along with Infraspinatus, primarily produces external rotation of the shoulder joint. It assists in adduction and extension of the shoulder. When the humerus is stabilized, abducts the inferior angle of the scapula.
What is the action of the teres minor muscle?
The teres minor is deep to the deltoid muscle. As a rotator cuff muscle, the teres minor stabilizes the ball-and-socket glenohumeral joint by helping hold the humeral head (ball) into the shallow glenoid cavity of the scapula (socket). The teres minor also laterally, or externally, rotate the arm at the shoulder joint.
What is the teres major muscle?
Teres major is a small muscle that runs along the lateral border of the scapula. It forms the inferior border of both the triangular space and quadrangular space. It’s sometimes called “lat’s little helper” because of its synergistic action with the latissimus dorsi.
What are the three movements of the teres major muscle?
The teres major causes three movements in the shoulder joint; due to its insertion at the anterior side of the humerus, it turns the humerus medially (inward rotation). Furthermore, it pulls the humerus behind (retroversion).
Where is the teres major muscle located in the shoulder?
The teres major is a thick muscle of the shoulder joint. Originating from the scapula and inserting into the humerus, this muscle is reponsible for the movement of the humerus and hence the arm in three different directions. It can be innervated by two nerves, namely the lower subscapular or thoracodorsal.
What causes pain in the teres minor muscle?
Teres Major and Teres Minor Major Pain . The Teres Major and Minor are important muscles, especially for throwing athletes. Overuse of the Teres Major can cause the muscle to become tight, resulting in increased upwards rotation for the scapula. This can cause impingement and discomfort in the shoulder.
Is the teres major an adductor or medial rotator?
The teres major is a medial rotator and adductor of the humerus and assists the latissimus dorsi in drawing the previously raised humerus downwards and backwards (extension, but not hyper extension).