Teres minor muscle

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Teres minor muscle
Gray810.png
Suprascapular and axillary nerves of right side, seen from behind. (Teres minor is visible at center.)
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
Latin musculus teres minor
Gray's subject #123 441
Origin lateral border of the scapula
Insertion    inferior facet of greater tubercle of the humerus
Artery: lateral circumflex humeral artery and the circumflex scapular artery
Nerve: axillary nerve
Action: laterally rotates and adducts the arm
Dorlands
/Elsevier
m_22/12551124

The Teres minor is a narrow, elongated muscle of the rotator cuff.

Origin and insertion

It arises from the dorsal surface of the axillary border of the scapula for the upper two-thirds of its extent, and from two aponeurotic laminæ, one of which separates it from the Infraspinatus, the other from the Teres major.

Its fibers run obliquely upward and lateralward; the upper ones end in a tendon which is inserted into the lowest of the three impressions on the greater tubercle of the humerus; the lowest fibers are inserted directly into the humerus immediately below this impression.

Relations

The tendon of this muscle passes across, and is united with, the posterior part of the capsule of the shoulder-joint.

Action

The Infraspinatus and Teres minor rotate the head of the humerus outward; they also assist in carrying the arm backward.

Variations

Sometimes a group of muscle fibres from teres minor may be fused with Infraspinatus.

Additional images

External links

See also

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 As such, some of the information contained herein may be outdated.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.

cs:Malý oblý sval de:Musculus teres minor id:Otot teres minor he:השריר העגול הקטן hu:Kis görgetegizom la:Musculus teres minor nl:Musculus teres minor sv:Teres minor


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