Electro-physiology and electro-therapeutics : showing the best methods for the medical uses of electricity / By Alfred C. Garratt.
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ficialis colli, which is formed of united branches from the sec- ond and third cervical nerves; it is found by the electrode as it crosses obliquely behind the external jugular vein at the anterior border of the sterno-mastoid where it divides into an ascending and a descending branch ; the latter is lost in the skin and fascia of the side and front of the neck, even to as low down as the clavicle; while the ascending branch passes upwards to the sub-maxillary region, and by very numerous branches they supply the integuments as high up as the chin and the lower part of the face ; it then anastomoses with the facial nerve. The second of the larger superficial nerve trunks here, is the auricularis magnus, formed also of the second and third cervical nerves. This first curves around the posterior border of the sterno-cleido-mastoideus, and then ascends upon that muscle parallel with the external jugular as far as the parotid gland, where it divides into an anterior and a posterior. The former is distributed to the integuments over the region of the parotid gland, and to the gland itself, connecting with the facial nerve and with the external ear. The posterior branch pierces the parotid gland, crosses the mastoid process, and then divides into many branches which are spread out upon the posterior region of the pinna, and the integuments of the side of the head and upper neck. But the most superficial nerve trunk of all, in this region, is the occipitalis minor, which arises from the second cervical nerve. It also curves around the posterior border of the sterno- cleido-mastoideus, but above the preceding nerve, and ascends also upon that muscle parallel with its posterior border, where it is easily affected by the electrode ; and from here it divides and is distributed to the muscles and skin of the region, namely, to the occipilo-frontalis, atlol/cns, and attrahens aurem, &c. The next most important and superficial nerve trunks are, the acromialis and the clavicularis. These are found as two, or sometimes three, large nerves, which, at first, proceed from the fourth cervical nerve ; but leaving the ganglion, they immediately subdivide into numerous branches, all of which pass downwards over the clavicle, and are distributed to the integuments of the