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The triangles of the neck describe the divisions created by the major muscles in the region.. The side of the neck presents a somewhat quadrilateral outline, limited, above, by the lower border of the body of the mandible, and an imaginary line extending from the angle of the mandible to the mastoid process; below, by the upper border of the clavicle; in front, by the middle line of the neck ...
The posterior triangle is crossed, about 2.5 cm above the clavicle, by the inferior belly of the omohyoid muscle, which divides the space into two triangles: an upper or occipital triangle; a lower or subclavian triangle (or supraclavicular triangle)
From a lateral aspect, the sternomastoid muscle is the most striking mark. It separates the anterior triangle of the neck from the posterior. The upper part of the anterior triangle contains the submandibular glands, which lie just below the posterior half of the mandible. The line of the common and the external carotid arteries can be marked ...
The scalene muscles are a group of three muscles on each side of the neck, identified as the anterior, the middle, and the posterior. They are innervated by the third to the eighth cervical spinal nerves (C3-C8). The anterior and middle scalene muscles lift the first rib and bend the neck to the side they are on. The posterior scalene lifts the ...
The carotid triangle (or superior carotid triangle) is a portion of the anterior triangle of the neck. Anatomy ... On the lateral side of the vessels, ...
Triangle of the vertebral artery is a region within the root of the neck and has following boundaries: [5] Medial border of anterior scalene muscle (lateral) Lateral border of longus colli muscle (medial) Carotid tubercle (apex) First part of subclavian artery (base)
The suboccipital triangle is a region of the neck bounded by the following three muscles of the suboccipital group of muscles: Rectus capitis posterior major - above and medially; Obliquus capitis superior - above and laterally; Obliquus capitis inferior - below and laterally
This space is subdivided into four smaller triangles by the digastricus above, and the superior belly of the omohyoideus. These smaller triangles are named: the muscular triangle; the carotid triangle; the submandibular triangle; the submental triangle