Teres major muscle

Teres major muscle

Muscle infobox
Name = Teres major muscle
Latin = musculus teres major
GraySubject = 123
GrayPage = 442


Caption = 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


Caption2 = Surface anatomy of the back. (label for Teres major at upper right.)
Origin = posterior aspect of the inferior angle of the scapula
Insertion = medial lip of the intertubercular sulcus of the humerus
Action = Internal rotation of the humerus
Blood = Subscapular and circumflex scapular arteries
Nerve = Lower subscapular nerve (segmental levels C5 and C6)
MeshName =
MeshNumber =
DorlandsPre = m_22
DorlandsSuf = 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.


=Additional

External links

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* [http://www.ptcentral.com/muscles/muscletrunk.html#teres%20major PTCentral]

ee also

*Accessory muscles of the scapula


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  • teres major muscle — noun teres muscle that moves the arm and rotates it medially • Syn: ↑teres major, ↑musculus teres major • Hypernyms: ↑teres, ↑teres muscle …   Useful english dictionary

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  • Teres minor muscle — Infobox Muscle Name = PAGENAME Latin = musculus teres minor GraySubject = 123 GrayPage = 441 Caption = Suprascapular and axillary nerves of right side, seen from behind. (Teres minor is visible at center.) Caption2 = Muscles on the dorsum of the… …   Wikipedia

  • Teres minor muscle — A muscle that assists the lifting of the arm during outward turning (external rotation) of the arm. The tendon of the teres minor muscle is one of four tendons that stabilize the shoulder joint and constitute the rotator cuff. Each of these four… …   Medical dictionary

  • teres major — noun teres muscle that moves the arm and rotates it medially • Syn: ↑teres major muscle, ↑musculus teres major • Hypernyms: ↑teres, ↑teres muscle …   Useful english dictionary

  • musculus teres major — noun teres muscle that moves the arm and rotates it medially • Syn: ↑teres major, ↑teres major muscle • Hypernyms: ↑teres, ↑teres muscle …   Useful english dictionary

  • musculus teres major — [TA] teres major muscle: origin, inferior angle of scapula; insertion, lip of intertubercular sulcus of humerus; innervation, lower subscapular; action, adducts, extends, rotates arm medially …   Medical dictionary

  • subtendinous bursa of teres major muscle — b. subtendinea musculi teretis majoris …   Medical dictionary

  • Pectoralis major muscle — Pectoralis major Pectoralis major Gray s subject #122 436 …   Wikipedia

  • teres major — te·res major ter ēz , tir n a thick somewhat flattened muscle that arises chiefly from the lower third of the axillary border of the scapula, passes in front of the long head of the triceps to insert on the medial border of the bicipital groove… …   Medical dictionary

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