Béclard's triangle is an area whose boundaries are the posterior border of the

hyoglossus The hyoglossus is a thin and quadrilateral extrinsic muscle of the tongue. It originates from the hyoid bone; it inserts onto the side of the tongue. It is innervated by the hypoglossal nerve (cranial nerve XII). It acts to depress and retract th ...

, the posterior belly of the

digastric muscle The digastric muscle (also digastricus) (named ''digastric'' as it has two 'bellies') is a bilaterally paired suprahyoid muscle located under the jaw. Its posterior belly is attached to the mastoid notch of temporal bone, and its anterior belly ...

and the greater horn of the

hyoid bone The hyoid-bone (lingual-bone or tongue-bone) () is a horseshoe-shaped bone situated in the anterior midline of the neck between the chin and the thyroid-cartilage. At rest, it lies between the base of the mandible and the third cervical verte ...

References

*{{cite journal, author1=R. Shane Tubbs, author2=Mark Rasmussen, author3=Marios Loukas, author4=Mohammadali M. Shoja, author5=Aaron A. Cohen-Gadol, title=Three nearly forgotten anatomical triangles of the neck: triangles of Beclard, Lesser and Pirogoff and their potential applications in surgical dissection of the neck, journal=Surgical and Radiologic Anatomy, date=January 2011, volume= 33, issue= 1, pages=53–57, pmid=20623121, doi=10.1007/s00276-010-0697-2 Human anatomy