Fig. 47-6. Cutaneous innervation of the head and neck. The vertex-ear-chin line separates the trigeminal territory from that of the cervical nerves. Although the central portion of the face is supplied by the trigeminal nerve only, it is believed that most of the skin of the face and neck "is supplied from a combination of trigeminal and upper cervical nerve roots" (L. Kruger and R. F. Young, in The Cranial Nerves, ed. by M. Samii and P. J. Jannetta, Springer, Berlin, 1981). A.-T., auriculotemporal n. (from the mandibular); GA, great auricular n. (CN. 2, 3); asterisk, probably branches from cranial nerves and 10; 1, 2, 3, ophthalmic, maxillary, and mandibular nn.; V-C, vertex-ear-chin line. Click for high resolution image.