THE NERVOUS SYSTEM 



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going fibres which are motor to the stylo-pharyngeus and 

 middle constrictor of the pharynx. 



The III. (Oculomotorius), IV. (Trochlearis), VI. (Ab- 

 ducens), and VII. (Facial), along with the V. (Trigeminal), 

 form what may be regarded as a pair. 



The Trigeminal is chiefly a posterior root, but it has a 



Rest 



FlG. 86. Cross Section through Region of Pons, Cerebellum, and Fourth Ventricle. 

 S. V. , Superior Vermis ; M.N., Roof Nucleus; Dent., Dentate Nucleus; 

 Rest., Restiform Body; S.P., Superior Peduncle of Cerebellum; Deit., 

 Deiters' Nucleus; VI., Nucleus of the Sixth Nerve; F., Fillet; S.O., 

 Superior Olive ; D. T. and S.T., Deep and Superficial Transverse Fibres ; P., 

 Pyramidal Fibres. (After BRUCE. ) 



distinct anterior or motor root which joins it, and carries the 

 motor fibres to the muscles of mastication. 



It is the great ingoing nerve for all the face. 



The VII. is almost purely an anterior root, transmitting 

 the motor fibres to the muscles of expression, and secretory 

 fibres to the submaxillary and sublingual glands and the 



