internal mammary plexus

periarterial plexus of internal thoracic artery

an autonomic plexus on the internal thoracic artery derived from the subclavian plexus.

Synonym(s): internal mammary plexus, internal thoracic plexus, plexus mammarius internus, plexus periarterialis arteriae thoracicae internae

internal mammary plexus

An obsolete term for:
(1) A nerve plexus in the breast parenchyma; 
(2) A network of autonomic nerves surrounding the internal thoracic artery.