antitragicus antitragicus the antitragicus is an intrinsic muscle of the outer ear. antitragicusthe muscles of the ear (antitragicus visible at bottom center).detailsoriginouter part of the antitragusinsertioncauda helicis and antihelixarteryauricular branch of superficial temporal and auricular branches of posterior auricular arterynervefacial nerveactionsmodifies the auricular shapeidentifierslatinmusculus antitragicusta98a15.3.01.042ta22098fma48980anatomical terms of muscle in human anatomy, the antitragicus arises from the outer part of the antitragus, and is inserted into the cauda helicis (or tail of the helix) and antihelix. the function of the muscle is to adjusts the shape of the ear by pulling the antitragus and cauda helicis towards each other. while the muscle modifies the auricular shape only minimally in the majority of individuals, this action could increase the opening into the external acoustic meatus in some. the helicis minor is developmentally derived from the second pharyngeal arch. additional images anatomy of human ear