Teres major muscle
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| Teres major muscle | ||
|---|---|---|
| Muscles on the dorsum of the scapula, and the Triceps brachii muscle: #3 is Latissimus dorsi muscle #5 is Teres major muscle #6 is Teres minor muscle #7 is Supraspinatus muscle #8 is Infraspinatus muscle #13 is long head of Triceps brachii muscle | ||
 | ||
| Surface anatomy of the back. (label for Teres major at upper right.) | ||
| Latin | musculus teres major | |
| Gray's | subject #123 442 | |
| Origin: | posterior aspect of the inferior angle of the scapula | |
| Insertion: | medial lip of the intertubercular sulcus of the humerus | |
| Artery: | Subscapular and circumflex scapular arteries | |
| Nerve: | Lower subscapular nerve (segmental levels C5 and C6) | |
| Action: | Internal rotation of the humerus | |
| Dorlands/Elsevier | m_22/12551115 | |
Teres major is a muscle of the upper limb and one of six scapulohumeral muscles. It is a thick but somewhat flattened muscle.
Origin and insertion
It arises from the oval area on the dorsal surface of the inferior angle of the scapula, and from the fibrous septa interposed between the muscle and the Teres minor and Infraspinatus
The fibers of teres major insert into the medial lip of the bicipital groove of the humerus.
Relations
The tendon, at its insertion, lies behind that of the Latissimus dorsi, from which it is separated by a bursa, the two tendons being, however, united along their lower borders for a short distance.
Together with teres minor muscle, teres major muscle forms the axillary space, where several important arteries and veins pass through.
Action
The Teres major assists the Latissimus dorsi in drawing the previously raised humerus downward and backward, and in rotating it inward; when the arm is fixed it may assist the Pectorales and the Latissimus dorsi in drawing the trunk forward.
External links
See also
This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.
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de:Musculus teres major fr:Muscle grand rond id:Otot teres major he:השריר העגול הגדול hu:Nagy görgetegizom la:Musculus teres maior nl:Musculus teres majorsv:Teres major
Acknowledgement and Attribution Regarding Sources of Content
Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .
