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The sternocleidomastoid muscle originates from two locations: the manubrium of the sternum and the clavicle. [4] It travels obliquely across the side of the neck and inserts at the mastoid process of the temporal bone of the skull by a thin aponeurosis. [4] [5] The sternocleidomastoid is thick and narrow at its center, and broader and thinner ...
This movement utilizes the bilateral sternocleidomastoid, bilateral scalene complex, bilateral submental complex. Retrocollis is the extension of the neck (head tilts back) and uses the following muscles for movement: bilateral splenius, bilateral upper trapezius, bilateral deep posterior paravertebrals. This is the "chin-in-the-air" version.
The sternocleidomastoid muscle gets its blood from different arteries in the neck, which bring oxygen and nutrients to keep the muscle healthy. Torticollis can happen when there are issues with the sternocleidomastoid muscle, like if it's too short, causing the head and neck to be in an odd position. [ 25 ]
There are several options of treatment when iatrogenic (i.e., caused by the surgeon) spinal accessory nerve damage is noted during surgery. For example, during a functional neck dissection that injures the spinal accessory nerve, injury prompts the surgeon to cautiously preserve branches of C2, C3, and C4 spinal nerves that provide supplemental innervation to the trapezius muscle. [3]
Side of the neck, with accessory nerve seen between the sternocleidomastoid and trapezius muscles The brain and upper spinal cord in a cadaver specimen. The accessory nerve can be seen as a number of rootlets arising from the medulla.
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 ...
Neck, Clavicular, Right, left base of mandible: inferior clavicle and fascia of chest: branches of submental artery, branches of suprascapular artery: cervical branch of facial nerve [CNVII] tenses skin of neck: masseter, temporalis: 2 1 sternocleidomastoid: Neck, Clavicular, Right, left manubrium sterni (sternal head), medial portion of ...
"Erb's point" is also a term used in head and neck surgery to describe the point on the posterior border of the sternocleidomastoid muscle, approximately 2-3cm above the clavicle, overlying the transverse process of the sixth cervical vertebra, [3] where the four superficial branches of the cervical plexus—the greater auricular, lesser ...