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In this video we discussed about the basics of triangle of neck. here we discuss the location, subdivisions and boundaries of varies triangles found in the neck region. The side of the neck is roughly quadrangular in shape. It is bounded anteriorly by anterior midline of the neck, posteriorly by anterior border of the trapezius, superiorly by the lower border of the body of the mandible and a line extending from the angle of the mandible to the mastoid process, and inferiorly by the clavicle.
This quadrilateral area is divided into large anterior and posterior triangles by the sternocleidomastoid muscle which runs across this area diagonally from mastoid process to the upper end of the sternum.
Posterior Triangle
Boundaries
Anterior: Posterior border of sternocleidomastoid muscle.
Posterior: Anterior border of trapezius muscle.
Inferior (base): Superior aspect of middle third of the clavicle.
Superior (apex): Meeting point of sternocleidomastoid and trapezius muscles at the superior nuchal line of the occipital bone.
The posterior triangle is subdivided into two parts by the inferior belly of the omohyoid.
(a) a larger upper part called occipital triangle
(b) a small lower part called subclavian (supraclavicular) triangle.
These parts are so named because they contain occipital and subclavian
arteries, respectively.
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.
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Dr. Ankit Jain
MBBS, MS
13 сен 2024
