Atlas and text-book of topographic and applied anatomy . l region. It may be superficially or deeply placed, isoften double, and frequently inosculates with the occipitalis major nerve (see page 28). 2. The auricularis magnus nerve, larger than the preceding and appearing below it at themargin of the sternocleidomastoid muscle. It runs directly upward to the ear upon the sterno-cleidomastoid muscle, supplies the skin of the auricle, that of the anterior and posterior auricularregions, and also the cutaneous lining of the external auditory meatus. It frequently divides intoan anterior and a pos
Atlas and text-book of topographic and applied anatomy . l region. It may be superficially or deeply placed, isoften double, and frequently inosculates with the occipitalis major nerve (see page 28). 2. The auricularis magnus nerve, larger than the preceding and appearing below it at themargin of the sternocleidomastoid muscle. It runs directly upward to the ear upon the sterno-cleidomastoid muscle, supplies the skin of the auricle, that of the anterior and posterior auricularregions, and also the cutaneous lining of the external auditory meatus. It frequently divides intoan anterior and a posterior branch. 3. The superficial is colli nerve (dividing into a superior and an inferior branch) runs anteriorlyat right angles to the sternocleidomastoid muscle and pierces the platysma in order to reach theskin. It is divided, usually at the anterior margin of this muscle, in exposing the great vesselsof the neck. Its upper branches inosculate with the cervical branches of the facial nerve. Faucial tonsil Fig. 26. Palatoglossal arch M. genioglossus. THE NECK. 69 4. A considerable number of supraclavicular nerves run downward in the region of thesupraclavicular fossa, some of them passing downward anteriorly and posteriorly over the sternumand the acromion; they supply the skin of the superior thoracic region and of the shoulder. The spinal accessory nerve, after perforating and supplying the sternocleidomastoid, leavesthe posterior margin of this muscle and runs obliquely downward and outward in the space be-tween the splenius and the levator anguli scapulae to the trapezius muscle. [The spinal accessorynerve enters the deep surface of the sternocleidomastoid about one and a half inches or lessbelow the tip of the mastoid process; perforating the muscle, it emerges at or a little below themiddle of the posterior border. A line from midway between the angle of the jaw and the tip ofthe mastoid through the middle of the posterior border of the sternocleidomastoid continued ac
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