CH. XLVI.] 



THE CRANIAL NERVES 



665 



fifth nerve with its long descending root, the nuclei of the eighth 

 nerve (only one of which, VHIra., is seen in the diagram), and the 

 glosso-pharyngeal and vagal portions of a long strand of nerve-cells 



3rd. Ventricle 



C.G. 



Str. A 



Lateral column 

 Funiculus cuneatus 

 Funiculus gracilis 



FIG. 408. Diagram to show the position of the nuclei of the cranial nerves (after Sherrington). The 

 medulla and pons are viewed from the dorsal aspect, the cerebrum and cerebellum having been cut 

 away. The nuclei (sensory coloured red, and motor blue) are represented as being seen through 

 transparent material. C.Q. a. t anterior corpus quadrigeminum ; C.Q. p., posterior corpus quadri- 

 geminum ; C.G., corpus genieulatum ; v.v., value of Vieussens ; I.e., locus cceruleus; e.t., eminentia 

 teres; str. A., stria? acoustic*. S.P., M.P., and I.P., superior middle and inferior cerebellar 

 peduncles respectively cut through. The numerals III. to XII. indicate the nuclei of the respec- 

 tive cranial nerves, all shown on the left side except the accessory-vago-glosso-pharyngeal IX., X., XI., 

 which to avoid confusion is placed on the right side. Vm. is the motor nucleus of the fifth nerve ; 

 Vei., the sensory nucleus of the same nerve with its long descending root; VHIm., the median 

 nucleus of the auditory nerve; N.I). Nucleus of Deiters; n. amb. nucleus ambiguus. The position 

 of the descending root of the ninth and tenth (fasciculus solitarius) is also indicated (J. s.). 



called the combined nucleus of the ninth, tenth, and eleventh nerves. 

 The remaining nuclei (coloured blue) are efferent, and may be 

 principally arranged into two groups : (1) the nuclei of the third, 



