Teres Major
Teres Major
Teres Major (/tɛrɪs ˈmeɪdʒər/; from Latin teres meaning 'rounded' and major meaning 'larger') is a muscle of the upper limb and one of the seven scapulohumeral muscles. It is a thick but somewhat flattened muscle, located in the upper part of the posterior aspect of the axilla.
Anatomy
The Teres Major originates from the posterior aspect of the scapula, near the inferior angle. It inserts into the medial lip of the humerus' intertubercular sulcus. The Teres Major is innervated by the lower subscapular nerve, a branch of the brachial plexus.
Function
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 hyperextension). It also helps stabilise the humeral head in the glenoid cavity.
Clinical Significance
Injury or strain to the Teres Major can result in limited arm and shoulder movement. It can also cause pain and discomfort, particularly during physical activities that involve the use of the shoulder.
Related Terms
External links
- Medical encyclopedia article on Teres Major
- Wikipedia's article - Teres Major
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