| Medical Dictionary: teres major muscle |
A muscle with origin from the lower third of the border of the scapula, with insertion into the medial border of the humerus, with nerve supply from the lower subscapular nerve from the fifth and the sixth cervical nerves, and whose action adducts and extends the arm and rotates it medially.
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| WordNet: teres major muscle |
The noun has one meaning:
Meaning #1:
teres muscle that moves the arm and rotates it medially
Synonyms: teres major, musculus teres major
| Wikipedia: Teres major muscle |
| Teres major muscle | |
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| 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 |
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| 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) |
| Actions | Internal rotation (medial rotation) of the humerus |
Teres major is a muscle of the upper limb and one of six scapulohumeral muscles. It is a thick but somewhat flattened muscle, innervated by lower subscapular nerve (c5,c6).
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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.
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, through which several important arteries and veins pass. Teres major is not part of the rotator cuff of the shoulder.
The teres major muscle is innervated by the lower subscapular nerve of the brachial plexus.
The Teres major is a medial rotator and adductor of the humerus and assists the Latissimus dorsi in drawing the previously raised humerus downward and backward. It also helps stabilize the humeral head in the glenoid cavity.
 Deep muscles of the chest and front of the arm, with the boundaries of the axilla. |
This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained within it may be outdated.
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 | angulus inferior |
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| Teres (disambiguation) |
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 | Medical Dictionary. The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Read more |
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| WordNet. WordNet 1.7.1 Copyright © 2001 by Princeton University. All rights reserved. Read more |
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| Wikipedia. This article is licensed under the Creative Commons Attribution/Share-Alike License. It uses material from the Wikipedia article "Teres major muscle". Read more |
