396 



ANATOMY OF THE CENTRAL NEEVOUS SYSTEM. 



sating path reaoliing upward from the bulbar trigeminal nucleus. The 

 fibers, which throughout its extent leave this nucleus and cross over the 

 median line, have since then been frequently seen; but only lately Wallen- 

 berg succeeded in making a section of them and demonstrating where the 

 central path of the trigeminus lies in the brain and where it ends. His- 

 examinations were made on rabbits. It was seen that the degenerated path. 



Fig. 252. — Section at the place where the ascending trigeminal root turns 

 around externally. Trigeminal roots. Dir. sens. CerebellarbaJiii, Direct sensory 

 cerebellar tract. Centr. V. Baku, Central tract of fifth nerve. Ceiitr. H. B., 

 Central tegmental tract. 



appearing after separation of the bulbar nucleus, was within the great asso- 

 ciation-field in the lower bulbar sections, close under the hypoglossal 

 nucleus, on the opposite side to the lesion, and was connected with it by 

 long, curved fibers. Higher up one finds it gradually taking a more lateral 



