Teres major muscle
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{{Muscle infobox |
Name = Teres major muscle |
Latin = musculus teres major |
GraySubject = 123 |
GrayPage = 442 |
Image = Arm muscles back numbers.png |
Caption = Muscles on the dorsum of the [[scapula]], and the [[Triceps brachii muscle]]: #3 is [[Latissimus dorsi muscle]]<BR>#5 is [[Teres major muscle]]<BR>#6 is [[Teres minor muscle]]<BR>#7 is [[Supraspinatus muscle]]<BR>#8 is [[Infraspinatus muscle]]<BR>#13 is long head of [[Triceps brachii muscle ]] |
Image2 = Gray1211.png |
Caption2 = Surface anatomy of the back. (label for Teres major at upper right.) |
Origin = posterior aspect of the [[Inferior angle of the scapula|inferior angle]] of the [[scapula]] |
Insertion = medial lip of the [[intertubercular sulcus]] of the [[humerus]] |
Action = [[Internal rotation]] of the [[humerus]] |
Blood = [[Subscapular Artery|Subscapular]] and [[circumflex scapular artery|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==
[[Image:Teres_major.PNG|thumb|left|200px|Posterior view showing the relations between teres major muscle (in red) and the other muscles connecting the upper extremity to the vertebral column.]]
The tendon, at its insertion, lies behind that of the [[Latissimus dorsi]], from which it is separated by a [[Bursa_(anatomy)|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 images==
<gallery>
Image:Gray411.png|Deep muscles of the chest and front of the arm, with the boundaries of the axilla.
</gallery>
==External links==
* {{MuscleLoyola|tmj}}
* {{GPnotebook|711655502}}
* {{SUNYAnatomyFigs|03|03|06}}
* [http://www.ptcentral.com/muscles/muscletrunk.html#teres%20major PTCentral]
==See also==
*[[Accessory muscles of the scapula]]
{{Gray's}}
{{Muscles_of_upper_limb}}
[[Category:Muscles of the upper limb]]
{{muscle-stub}}
[[ar:عضلة مدورة كبيرة]]
[[cs:Velký oblý sval]]
[[de:Musculus teres major]]
[[fr:Muscle grand rond]]
[[id:Otot teres major]]
[[he:השריר העגול הגדול]]
[[hr:Veliki obli mišić]]
[[hu:Nagy görgetegizom]]
[[la:Musculus teres maior]]
[[nl:Musculus teres major]]
[[pl:Mięsień obły większy]]
[[pt:Músculo redondo maior]]
[[sv:Teres major]]
[[sl:Velika okrogla mišica]]