Medial pectoral nerve

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The medial pectoral nerve is a branch of the medial cord of the brachial plexus.

Medial pectoral nerve

Origin: Medial cord of the brachial plexus
Arterial supply:
Venous drainage:
Lymphatic drainage:
Innervation: Pectoralis minor, pectoralis major
Vertebral levels: C8 nerve root, T1 nerve root
Search for Medial pectoral nerve in Gray's.


Anatomical Course

The nerve leaves the medial cord of the brachial plexus where the plexus lies posterior to the axillary artery. The nerve winds around the axillary artery and vein to join a ramus of the lateral pectoral nerve anterior to the artery. It enters the posterior surface of pectoralis minor to supply it, and may pierce the muscle and/or send branches around its inferior border to supply pectoralis major.

Motor Supply

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