Nerves of the Pectoral Muscles

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Diagram of the origin and distribution of the nerves to the pectoral muscles. E.A.T., external thoracic nerve; I.A.T., internal anterior thoracic nerve; C.5, 6, 7, C.8, T.1, nerves of the brachial plexus; ART., axillary artery; CL, clavicle; SCL., subclavius muscle; P.Mr, pectoralis minor, joined to subclavius by costocoracoid membrane; P.MA, pectoralis major.


Cunningham, D.J. Textbook of Anatomy (New York, NY: William Wood and Co., 1903)


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