SEVENTH PAIR— PORTIO DURA, OR FACIAL. 



SIXTH PAIR ABDUCENS. 



This is a nerve of motion, hes its apparent origin close "bthiO - 

 the pons Yaroli', at its junction with the inferior pyramids, aii^/ 

 its fibres can be traced to the inferior pyramids and lateral bundles 

 of the medulla. From its origin it passes forwards through the 

 foramen lacerum orbitale, in company with the third and the 

 ophthalmic branch of the fifth Aep?G3, and is distiibuted to tli^ 

 abductor oculi, or external ractus, arid the external portign of tii^ 

 zetractor oculi muscles. 



Fio.188.^ 



lieft ride of the faoe— iliowing tire ilstribntion of the facial portions of the flf th aad the aeveafig 

 'Serves, a. Infraorbital; b, Masseter; c, Superior; d, Inferior branch of subzygomatic : i'A-_»r 

 terlor ; /, Middle ; g. Posterior auricular ; h h, Posterior temporal ; t Cervical branch ; Ic. St7A0ioL 

 III, Parotid branches ; m, Facial ; n n' n". Its superior portion ; o. Its inferioi: portion^ 



SEVENTH PAIR — PORTIO ^WA. OB FACIiiL. 



This nerve has its apparent origin in a d3p::3ssion in tb» 

 medulla oblongata between the olivary and restiform bodies : its 

 deep origin can be traced to the floor of the fourth ventricle aiwl. 

 olivary fasciculus. From its origin it passes outwards, in compai»y 

 with the eighth nerve, along with which it enters the meatinK 

 auditorius intemus, and thence into the aqueduct of Fallopiu% 



'2k 



