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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
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 ...
Posteriorly by (the anterior border of) the sternocleidomastoid muscle, Anteroinferiorly by (the superior belly of) the omohyoid muscle . Superiorly by (the posterior belly of) the digastric muscle .
Anatomy figure: 25:01-03 at Human Anatomy Online, SUNY Downstate Medical Center - "Identification of the subdivsions of the anterior triangle and corresponding borders." Anatomy photo:25:19-0101 at the SUNY Downstate Medical Center - "Anterior Triangle of the Neck: The Submental Triangle"
Anterior triangle is defined by the anterior border of the sternocleidomastoid muscle, inferior edge of the mandible and the midline of the neck. It contains the stylohyoid , digastric , mylohyoid , geniohyoid , omohyoid , sternohyoid , thyrohyoid and sternothyroid muscles .
It is a potential space, and is paired on either side, located on the superficial surface of the mylohyoid muscle between the anterior and posterior bellies of the digastric muscle. [1] The space corresponds to the anatomic region termed the submandibular triangle, part of the anterior triangle of the neck.
The mylohyoid muscle originates from the anterior (front) part of the mylohyoid line. [1] Rarely, the mylohyoid muscle may originate partially from other surfaces of the mandible. [ 2 ] The posterior (back) part of this line, near the alveolar margin , gives attachment to a small part of the superior pharyngeal constrictor muscle , and to the ...
Anterior atlantooccipital membrane; Anterior pituitary; Anterior triangle of the neck; Arcuate eminence; Arcuate foramen; Arytenoid cartilage; Arytenoidectomy; Asterion (anatomy) Auricular branch of vagus nerve