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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 ...
Infrahyoid muscles. Muscles of the neck seen from the front. The infrahyoid muscles are coloured in violet. The infrahyoid muscles, or strap muscles, are a group of four pairs of muscles in the anterior (frontal) part of the neck. [1] The four infrahyoid muscles are the sternohyoid, sternothyroid, thyrohyoid and omohyoid muscles.
Anterior boundary. Midline of the neck from chin to the jugular notch. Posterior boundary. The anterior margin of sternocleidomastoid. Superior boundary (base) The lower border of the body of the mandible, and a line extending from the angle of the mandible to the mastoid process. Investing fascia covers the roof of the triangle while visceral ...
Superficial to the carotid sheath lies the hypoglossal nerve, and ansa cervicalis of the cervical plexus.. The hypoglossal nerve crosses both the internal and external carotids, curving around the origin of the occipital artery.
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Anatomical terminology. [edit on Wikidata] The suboccipital triangleis a region of the neckbounded 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.
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 is attached to the digastric fossa of mandible; the two bellies are united by an intermediate tendon which is held in a loop that attaches to the hyoid bone.
The clavipectoral triangle (also known as the deltopectoral triangle) is an anatomical region found in humans and other animals. It is bordered by the following structures: It contains the cephalic vein, [4] and deltopectoral fascia, which is a layer of deep fascia that invests the three structures that make up the border of the triangle.