DISTRIBUTION OF CEREBRO-SPINAL NERVES. 



339 



nerve. The soft palate receives branches from the superior maxillary and glosso- 

 pharyngeal nerves. The mucous membrane of the pharynx in its upper part, 

 including the mouth of the Eustachian tube, receives twigs of the superior maxillary 



Fig. 220. CUTANEOUS AREAS OP THE NERVES OF THE HEAD AND NECK. (Gr.D.T.) 



The areas supplied by the branches of the first division of the fifth are enclosed by black lines ; 

 those supplied by the second division of the fifth and by branches of the cervical plexus by red lines : 

 and those supplied by the third division of the fifth and by the posterior primary divisions of the 

 cervical nerves by blue lines. S T, supratrochlear, I T, infratrochlear, and L, lachrymal branches of 

 the first division of the fifth. The hinder part of the cheek, on which the word "auriculo " is placed, 

 receives fibres of the auriculo-temporal nerve through the communication with the facial. The black 

 spots denote the points at which the respective nerves become superficial. 



In this and similar figures the overlapping of adjacent nerves is indicated, so that along the boundary 

 of each area there is a region which is supplied by the two nerves. It is, however, to be remarked 

 that, owing to the difficulty of determining anatomically the precise extent of skin supplied by a branch 

 of nerve, and the great degree of individual variability in this respect, neither the extent of the several 

 areas nor the degree of overlapping are to be regarded otherwise than as approximate representations of 

 what appears to be the average condition. 



