Study note
AnatomyAxilla

Lateral and medial relations of the third part of the axillary artery

THE CONTEXT
The third part of the axillary artery has different median nerve relations in its upper and lower portions.

Lateral relations

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Coracobrachialis lies lateral to the third part of the axillary artery.
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The musculocutaneous nerve and lateral root of the median nerve lie laterally in the upper portion.
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The trunk of the median nerve lies laterally in the lower portion.

Medial relations

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The axillary vein lies medial to the artery.
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The medial cutaneous nerve of the forearm and the ulnar nerve lie between the axillary artery and vein.
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The medial cutaneous nerve of the arm lies medial to the axillary vein.
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