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pectoral nerve

n :  either of two nerves that arise from the brachial plexus on each side or from the nerve trunks forming it and that supply the pectoral muscles:  a  :  one lateral to the axillary artery - called also lateral pectoral nerve , superior pectoral nerve   b  :  one medial to the axillary artery - called also inferior pectoral nerve , medial pectoral nerve  .

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