The submental triangle, a subdivision of the anterior triangle of the neck, is bounded by which structures and contains which primary content?

• A Bounded by the two carotid arteries; contains the carotid body and sinus
• B Bounded by the anterior bellies of the digastrics and the hyoid bone; contains submental lymph nodes and small veins ✓
• C Bounded by the sternocleidomastoid, omohyoid, and anterior midline; contains the submandibular gland
• D Bounded by the posterior belly of digastric, stylohyoid, and superior belly of omohyoid; contains internal jugular vein

Explanation

The submental triangle is an unpaired midline triangle bounded by: the two anterior bellies of the digastric muscles laterally, and the hyoid bone inferiorly (its floor is the mylohyoid). Its primary contents are submental lymph nodes (Level IA) and small veins that join to form the anterior jugular vein. This triangle is the only unpaired triangle of the neck. The submandibular triangle (also called digastric triangle) is bounded by the mandible, anterior and posterior bellies of digastric, and contains the submandibular gland and facial vessels.

Reference: BD Chaurasia's Human Anatomy, 8th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.