Antitragicus muscle

Last revised by Reabal Najjar on 15 May 2023

The antitragicus muscle is an intrinsic muscle of the outer ear that is part of the broader auricular muscle group.

  • origin: posterior surface of the antitragus

  • insertion: tail of the helix

  • innervation: posterior auricular branch of the facial nerve

  • action: assists in ear movements

The antitragicus muscle originates from the antitragus, an eminence opposite the tragus located on the inferior part of the pinna.

This muscle inserts into the tail of the helix, the upper and back part of the pinna.

The antitragicus muscle is situated adjacent to other muscles of the auricular group, including the helicis major, helicis minor, and tragus muscles.

The posterior auricular artery, a branch of the external carotid artery, is responsible for supplying the antitragicus muscle.

The posterior auricular vein, which generally parallels the artery, takes care of the venous drainage for the antitragicus muscle.

Innervation for the antitragicus muscle is provided by the posterior auricular branch of the facial nerve 2.

The antitragicus muscle aids in making minor movements of the ear. However, the extent of its functionality varies among individuals, with some demonstrating more precise control over these muscles than others 1.

The antitragicus muscle, like other auricular muscles, exhibits a high degree of variation. Some individuals may have a hypertrophic, or enlarged, muscle, while others may possess a rudimentary or even absent muscle 2.

The antitragicus muscle, along with other auricular muscles, develops from the second pharyngeal arch during embryonic development 1,2.

ADVERTISEMENT: Supporters see fewer/no ads

Updating… Please wait.

 Unable to process the form. Check for errors and try again.

 Thank you for updating your details.