885 



spinalis the destroyed fibres are maiuly lying in the peripheric pai't 

 of' holli llie lateral coliinins, but they are nol enliieiy lacking in 

 tiie peripheric /.ones of the dorsal and ventral columns. As to the 

 (iegeneration of the riglil (inocnhUed) side of the medulla, the sup- 

 position lies at hand thai the virus as soon as it has reached the 

 spinal chord by the anterior or posterior rools, takes the most 

 peripheric lying luyelinsheatlis as a medium for its growth. But tlien 

 it has to be explained that tiieie is scaicely any difference between 

 bolh Ihe lateral columns and even in a transversal section of the 

 lumbal medulla, it is difficiill f.o see which side is the inocidated side. 

 Howevei-, this histopathological fact fully agrees with the experi- 

 ments of Roti.x, which leach ns, that the \irus dire(!tly after its 

 arrival in Ihe medulla infects Ihe opposite side, so thai Ihe peripheric 

 nerve of this not iiiociilaled side becomes vindeni, before the proximal 

 and distal parts of the mediUla are infected. Supposing, the nenro- 

 giiareticnlum, in which meshes the nervefibres are i^'ing, undertakes 

 the transport of the virus, Iheii it is nol explained why the more 

 centrally lying myelinsheaths have not altered. Our opinion in this 

 (pieslion is, that probably the liquor cerebrospinalis surrounding the 

 medulla as well as the anterior and poslerioi' rools undertakes also 

 the iraiis|)orl. (The experiments of Daniel Konkat)! recently proved 

 the viridence of Ihe liquor cerebro-spinalis, a fad that hither'to was 

 denied in literature). 



The answer to the third queslion, whether the virus reaches the 

 salivary gland by growing along the atf'eient or efferent nerves, 

 required a complete examination of a larger pail of Ihe brainstem 

 of Nervus facialis with chorda tympani, and (d' the ganglion Gasseri 

 with Nervus trigeininiis, especially its ramus lingualis. Annexed 



scheme demouslrating the innervation of 

 the salivary gland of rabbits and dogs 

 sliows what nerves were submitled lo 

 exannnalion. 



The biainsleni, (ixaled in Fi.t'.M.MiNGs 

 fluid was sectioned in a series of trans- 

 \ersal slices in order to slain them with 

 Fuchsin Lichtgriin. 



Fig. X representing a section through 

 the brainstem and the rools of N. V. shows 

 the degenerated fibres especially in the 

 |)oitio minor, (hough also the [lorlio major has swollen or deslroyed 

 fibres. 





Schemr of the examinated 

 parts of N. V. and V. Vli. 



