Crus of helix
Crus helicis
Definition
The crus of helix refers to the cartilaginous ridge at the anterior origin of the helix, projecting medially over the concha. It forms the initial segment of the helix as it arises from the auricular cartilage. This structure is also commonly termed the anterior root of the helix, and both terms are used interchangeably.
Following its origin, the crus of helix forms a distinct horizontal or slightly oblique elevation that separates the cymba conchae (the upper part of the concha) from the cavum conchae (the lower part or the main cavity of the concha).
References
National Human Genome Research Institute. (n.d.) Anatomy of the ear and related information. Available at: [https://elementsofmorphology.nih.gov/anatomy-ear.shtml] (Accessed: 27 May 2025).
Szymanski A, Geiger Z. Anatomy, Head and Neck, Ear. [Updated 2023 Jul 24]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2025 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK470359/
