8 0. WINKLER. THE CENTliAL COURSE 



dorsal nucleus of the VIII th nerve extends more laterally and the 

 portio interna of the C. R. has become more extended in such 

 a way , that the large cells of DEITEKS , which in distal sections 

 only were found at its latero-dorsal edge on the medial border of 

 the oval area, now make their apperance on its dorsal border. 



In this way the radiation of the fan is enlarged. Laterally always 

 collaterals of the stratum inedullare profundum enter into the tuber- 

 culum , but dorsally the radiation is now opened towards the lateral 

 part of the dorsal nucleus n. VIII and towards the portio interna 

 corporis restiformis. After removal of the cochlea , there are always 

 found degenerated fibres here. 



They are the dorsal root-fibres, remaining after the emission of the 

 trunk to the ventral nucleus and the collaterals to the tubercnlum 

 acusticnm. 



Those fibres are tending for the greater part towards the lateral 

 part of the dorsal or triangular auditory nucleus. Their number, 

 is chiefly in proximal regions increased by root-section of the N. octavus. 

 If I have rightly understood LEWANDOWSKI , those fibres would be 

 represented in dogs by a contracted bundle , described by him 

 under the name of the fasciculus solitarius of the eighth nerve. 

 Apparently LEWANDOWSKI has had in mind a comparison with the 

 fasc. solitarius riervi vagi. But in rabbits this radiation of root- 

 fibres towards the lateral cells of the dorsal nucleus occurs conti- 

 nually and so there is no reason to speak of a fasciculus solitarius. 

 The dorsal nucleus in rabbits extends rather far proximally , even 

 so far, that when the fibres of the oval area have found their 

 way to the cerebellum and no longer belong to the medulla 

 (f. i. Plate VIII fig. 15 N. 812), still the lateral part of the 

 nucleus dorsalis exists. 



Now continually fibres are running to this part. In the more 

 distal part , they are chiefly rootfibres of the dorsal root , more 

 proximally they are merely dorsal fibres of the ventral root, and 

 as the corpus restiforme evades to the cerebellum the medial 

 fibres of the ventral root enter in it. 



But the distal fibres, we have here in view are chiefly dorsal 

 rootfibres , degenerating after removal of the cochlea. They take 

 different ways. 



l e . They send collaterals in the lateral part of the dorsal nucleus 

 to its lateral group of cells. 



2 e . A few fibres go farther between the dorsal nucleus and the 

 portio interna corporis restiformis and become dorsal transverse fibres. 



3 e . A few fibres penetrate into the portio interna and augmented 



