Anatomy
Definition
The tragus is the small cartilaginous projection in front of the opening of the external ear canal.
Aliases and abbreviations
auricular tragus
Editorial record
Published: August 25, 2026 · Reviewed: August 25, 2026
Expanded definition
The tragus forms part of the outer ear and projects backward over the entrance to the ear canal. It is distinct from the conchal bowl, the anti-tragus, and the earlobe.
Some auricular stimulation studies place an electrode on or near the tragus. Other protocols use the cymba conchae, cavum conchae, or additional auricular locations.
The outer ear has mixed and variable innervation. Naming the tragus identifies the visible placement region; it does not by itself establish selective stimulation of the auricular vagal branch.
What the term does not establish
Why the distinction matters
Precise ear-location language makes studies and devices easier to compare without treating every auricular placement as equivalent.
Main guide
A broader guide to ear anatomy, taVNS, placement language, and interpretation limits.
Read the auricular guideRelated terms
Anatomy
Stimulation methods
Anatomy
Anatomy
Anatomy
Protocol and stimulation parameters
Editorial scope
This glossary entry supports general education. It does not diagnose, recommend treatment, or transfer findings from one VNS method, protocol, or device to another.