- Teres major muscle
Muscle infobox
Name = Teres major muscle
Latin = musculus teres major
GraySubject = 123
GrayPage = 442
Caption = Muscles on the dorsum of thescapula , and theTriceps brachii muscle : #3 isLatissimus dorsi muscle
#5 isTeres major muscle
#6 isTeres minor muscle
#7 isSupraspinatus muscle
#8 isInfraspinatus muscle
#13 is long head ofTriceps brachii muscle
Caption2 = Surface anatomy of the back. (label for Teres major at upper right.)
Origin = posterior aspect of the inferior angle of thescapula
Insertion = medial lip of theintertubercular sulcus of thehumerus
Action =Internal rotation of thehumerus
Blood = Subscapular and circumflex scapular arteries
Nerve =Lower subscapular nerve (segmental levels C5 and C6)
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DorlandsPre = m_22
DorlandsSuf = 12551115Teres 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 theTeres minor andInfraspinatus 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 theaxillary 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.
=AdditionalExternal links
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* [http://www.ptcentral.com/muscles/muscletrunk.html#teres%20major PTCentral]ee also
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Accessory muscles of the scapula
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