Study note
AnatomyAxilla

Lateral and medial cords: the M-shaped arrangement

THE CONTEXT
The lateral and medial cords of the brachial plexus and their branches form an M-shaped arrangement with three extended corners.

Branches and median nerve formation

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The lateral cord gives the musculocutaneous nerve and the lateral root of the median nerve.
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The medial cord gives the ulnar nerve and the medial root of the median nerve.
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The lateral and medial roots unite to form the median nerve.
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