Teres major muscle
|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|
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
The fibers of teres major insert into the medial lip of the bicipital groove of the humerus.
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.
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 As such, some of the information contained herein may be outdated.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.