524 



THE CRANIAL NERVES. 



Fi^. 331. — A. SemidIagrammatic View of a Deep Dissection op the Cranial Nerves 

 ON the left side of the Head (from various authors and from nature). B. Ex- 

 planatory Outline of the same. A. T. A 



Fig. 331, A. 



Tbe Roman numerals from I to IX indicate the roots of tne several cranial nerves as 

 they lie in or near their foramina of exit. Y, is upon the great root of the fifth with the 

 ganglion in front ; a and b, in connection with VII, indicate respectively the facial and 

 auditory nerves ; a, h, and c, in connection with VIII, point respectively to the glosso- 

 pharyngeal, pneumo-gastric, and spinal accessory nerves : C I, the suboccipital or first 

 cervical nerve ; C VIII, the eighth. The branches or distributed parts of the nerves are 

 marked as follows, viz. : — -1, frontal branch of the fifth ; 2, lachrymal passing into the 

 gland ; 3, nasal passing towards the internal orbital foramen and giving the long twig 

 to the ciliary ganglion (i') ; 3', external branch of the internal nasal nen-e ; 4, lower 

 branch of the third or oculo-motor nerve ; 5, the superior maxillary division of the fifth 

 passing into the infraorbital canal; 5', its issue at the infraorbital foramen and distri- 

 bution as inferior palpebral, lateral nasal, and superior labial nerves (5") ; 6, ganglion of 

 Meckel and Vidian nerve passing back from it ; 6', palatine and other nerves descending 

 from it ; 6". superior petrosal nerve ; 7, posterior superior dental nerves ; 7', placed in 

 the antrum maxillare, which has been opened, points to the anterior superior dental 

 nerves ; S, inferior maxillary division of the fifth immediately below the foramen ovale ; 

 S', some of the muscular branches coming from it ; 8 + , the anterior auricular branch 

 cut short, and above it the small petrosal nerve to join the facial nerve ; 9, buccal and in- 

 ternal pterygoid ; 10, lingual or gustatory nerve ; 10 , its distribution to the side and front 



