. Cunningham's Text-book of anatomy. Anatomy. 696 THE NERVOUS SYSTEM. supply the skin of the cheek over the inferior part of the masseter muscle and the parotid gland. They communicate with branches of the facial nerve in the parotid gland. The nervns cutaneus colli arises from the second and third cervical nerves. It winds round the posterior border of the sterno-mastoid muscle, and crosses the muscle to reach the anterior triangle, under cover of the platysma muscle and the externa] jugular vein. It divides near the anterior edge of the sterno-mastoid muscle into superior and inferior branch
. Cunningham's Text-book of anatomy. Anatomy. 696 THE NERVOUS SYSTEM. supply the skin of the cheek over the inferior part of the masseter muscle and the parotid gland. They communicate with branches of the facial nerve in the parotid gland. The nervns cutaneus colli arises from the second and third cervical nerves. It winds round the posterior border of the sterno-mastoid muscle, and crosses the muscle to reach the anterior triangle, under cover of the platysma muscle and the externa] jugular vein. It divides near the anterior edge of the sterno-mastoid muscle into superior and inferior branches, which are distributed through the platysma to the skin covering the anterior triangle of the neck. The upper branches communicate freely beneath the platysma with the ramus colli of the facial nerve. Descending (supra-clavicular) Branches.—By the union of two roots derived from the third and fourth cervical nerves a considerable trunk is formed, which emerges from under cover of the sterno- mastoid muscle and extends obliquely downwards through the inferior part of the posterior triangle of the neck. It sub- divides into radiating branches —anterior, middle, and posterior —which pierce the deep fascia of the neck above the clavicle, and are distributed to the skin of the inferior part of the side of the neck, to the front of the chest, and the shoulder. The anterior ( supra - sternal) branches are the smallest. Pass- ing over the medial end of the clavicle, they supply the skin of the neck and chest as far down as the synchondrosis sternalis. The middle ( supra-clavicular) branches pass over the intermediate third of the clavicle, beueath the platysma, and can be traced as low as the nipple. The posterior ( supra-acromial) branches pass over or through the insertion of the trapezius muscle, and over the lateral third of the clavicle, to the shoulder, where they supply the skin as far down as the distal third of the deltoid muscle. Deep Branches.—The deep
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1914
