Submental triangle of neck/ Anatomy/ Simplified - Boundaries and contents/ Anterior triangle of neck
In this video we discussed about the Submental triangle of neck. here we discuss the location, boundaries and contents of submental triangle.
Anterior Triangle
Boundaries
Anterior: Anterior median line of the neck.
Posterior: Anterior border of the sternocleidomastoid muscle.
Base: Lower border of the body of mandible and a line extending from the angle of mandible to the mastoid process.
Apex: Suprasternal notch at the meeting point between anterior border of sternocleidomastoid and anterior median line.
Anterior triangle has been subdivided, by the digastric muscle and superior belly of omohyoid muscle, into the following 3½ triangles.
1. Submental triangle (half only).
2. Digastric (submandibular) triangle.
3. Carotid triangle.
4. Muscular triangle.
Submental triangle
It is actually a median triangle on the front of neck below the chin and above the hyoid bone.
Boundaries
On each side: Anterior belly of digastric muscle.
Base: Body of hyoid bone.
Apex: Chin or symphysis menti.
Floor: is formed by the two mylohyoid muscles meeting at the median fibrous raphe extending from symphysis menti tothe hyoid bone.
Roof: Investing layer of deep cervical fascia.
Contents
1. Submental lymph nodes (3 or 4 in number).
2. Submental veins and commencement of anterior jugular
veins.
The contents of the triangle actually lie in the superficial fascia over the roof of the submental triangle.
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