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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 ...
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 .
The anterior scalene muscle (Latin: scalenus anterior), lies deeply at the side of the neck, behind the sternocleidomastoid muscle.It arises from the anterior tubercles of the transverse processes of the third, fourth, fifth, and sixth cervical vertebrae, and descending, almost vertically, is inserted by a narrow, flat tendon into the scalene tubercle on the inner border of the first rib, and ...
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.
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"
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.
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)