Medial intermuscular septum
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| Medial intermuscular septum | |
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| Cross-section through the middle of upper arm. (Medial intermuscular septum of humerus labeled at center right.) | |
| Latin | s. intermusculare brachii mediale |
| Gray's | subject #124 442 |
| Dorlands/Elsevier | s_08/12730299 |
The medial intermuscular septum, thicker than the lateral intermuscular septum, extends from the lower part of the crest of the lesser tubercle of the humerus below the Teres major, along the medial supracondylar ridge to the medial epicondyle; it is blended with the tendon of the Coracobrachialis, and affords attachment to the Triceps brachii behind and the Brachialis in front.
It is perforated by the ulnar nerve, the superior ulnar collateral artery, and the posterior branch of the inferior ulnar collateral artery.
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