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AN AMERICAN TEXT-BOOK OF PHYSIOLOGY. 



sents the path for the sensory impulses finding their way by the antero-lateral 

 tract, then the impulses are finally delivered to the hemisphere on the same 

 side of the system as that on which they enter. 



The direct cerebellar tracts pass by the way of the restiform body to the 



A 



N.D.S. ST.MED.D. 



ST.MED.S. 



T.A.S. 



N.D.D. 



VIIIB.P.S. 



(ATE.)"' 



VII.K. 



T.A.D. 



N.D.S. 



N.D.D. 



VIII.B.A.D. 



VII. 



FIG. 180. Sections of the bulb of a rabbit after lesion of the cochlear portion of the eighth nerve 

 (Onufrowicz) : A, section at the level of the posterior root of the eighth nerve ; B, section at the level of 

 the accessory ganglion of the eighth nerve. In the designations the final S=" left " and the final D = 

 " right." C. R, restiforme ; N.D, dorsal nucleus ; P, pyramids ; St. Med, striae medullares ; T.A, tuberculum 

 acusticum (atrophied on the left side) ; 61. Ac, accessory ganglion (atrophied on the left side) ; VIII.R.P, 

 posterior root of the eighth nerve (atrophied on the left side) ; VIII.R.A, anterior root of the eighth nerve ; 

 VII. O, knee of the seventh nerve ; VII.K, nucleus of the seventh nerve ; V, root of the fifth nerve. 



middle lobe of the cerebellum, mainly on the same side ; from here, by way 

 of the superior peduncle, there is a crossed connection with the more cephalic 

 cell-masses. 



On passing up the axis the sensory cranial nerves appear. Those which 

 depart most from the type of the dorsal spinal nerves are the eighth or audi- 



