204 A MANUAL OF ANATOMY. 



through the middle ear and reaches the base of the skull 

 by way of the canal of Huguier. See page 1 18. 



(The deep origin of the facial nerve is from a nucleus in 

 the floor of the fourth ventricle opposite the lower part of 

 the pons ; its cortical area is in the lower part of the pre- 

 central convolution of the frontal lobe.) 



8. The Auditory Nerve. Figs. 29, 53, 10. 



This arises just external to the facial at the posterior 

 margin of the pons. Its course is outward to the internal 

 auditory meatus along with that nerve. Besides these two 

 nerves the auditory vessels traverse this foramen. 



The distribution of the auditory nerve is in two portions : 

 one to the cochlea, utricle, and saccule ; the other to the 

 semicircular canals. (The deep origin of the nerve is from 

 three nuclei in the floor of the fourth ventricle, and the 

 cortical location for hearing- is in the first or superior tem- 

 poral convolution.) 



9. The Glossopharyng-eal Nerve. Figs. 53, 10, n. 

 The ninth, tenth, and accessory portion of the eleventh 



nerves arise from the side of the medulla, in the groove be- 

 tween the restiform tract behind and the olivary body and 

 the lateral tract of the medulla in front. 



The deep origin of these nerves is from a continuous 

 nucleus in the floor of the posterior part of the fourth ven- 

 tricle and adjacent part of the cord. 



The ninth, tenth, and the eleventh nerves leave the skull 

 through the central compartment of the jugular foramen. 

 See page 98. 



There are two ganglia developed upon the glossopha- 

 ryngeal nerve in its course through the jugular foramen 

 the jugular and the petrous. 



