36! Anton Doliru 



London Voi. 31 ISSI pag-. 34S) in einer »Note on the occurrenee 

 of Ganglion Cells in the Anterior Boots of the Cat's Spinai Nerves (f 

 schreibt : 



» Ganglion cells are of Constant occurrenee among the nerve- 

 fibres of the anterior roots of the cat's spinai nerves. They are ge- 

 nerally to be found in that part of the anterior root which passes 

 by the ganglion which is seated upou the posterior root. They are 

 not necessarily situated next the ganglion, but are often imbedded 

 in the middle of the anterior root, or found lying along its anterior 

 margin and therefore as far removed as possible frora the ganglion 

 upon the other root. Moreover they sometimes occur in the anterior 

 root before this has come in contact with the ganglion, just as iso- 

 lated ganglion cells are occasionally to be found in the posterior 

 root, some little distance on the spinai- cord side of its g-auglion. The 

 cells in question, althoiigh not in any case numerous, are to be 

 found in most longitudinal sections of the anterior roots, but they 

 seem to be especially abundant in those of the lower dorsal and 

 lumbar nerves. They resemble on the whole very closely the gan- 

 glion cells in the spinai ganglion upon the sensory root, but it has 

 not hitherto been possible to make out their mode of connexion with 

 the nerve-fìbres. 



»I bave sought in vain for ganglion cells in a similar Situation 

 in the nerve-roots of man, the dog, the rabbit and the mouse. The 

 evidence, therefore, appears against the existence of any relation 

 between the occurrenee of these cells in the anterior root and the 

 phenomenon of sensibility in that root, known as »recurrent Sensa- 

 tion«, for the latter has been observed in animals in which I bave 

 been entirely unable to detect the existence of the cells in question.« 



Es muss weiteren anatomischen Untersuchungen vorbehalten 

 bleiben, über das Vorkommen dieser Ganglienzellen in den motorischen 

 Nerven auch bei anderen Vertebraten Aufklärung zu schafien. Es 

 wird vielleicht nicht immer gelingen, diese Zellen in der Nähe der 

 Wurzeln zu entdecken, aber das kann nicht beweisen, dass sie nicht in 

 dieselben aus dem Bereich der Vorderhöruer ausgetreten seien. 

 Gerade die am Oculomotorius und z. Th. auch beim Abducens beob- 

 achteten Thatsachen zeigen , dass diese Ganglienzellen eine ganz 

 specifische Fähigkeit des Wanderns besitzen : und sie können 

 wahrscheinlich an allen motorischen Nerven solche Wanderungen in 

 die Peripherie vornehmen. Ob die Ganglienzellen, welche man in 

 den Wandungen der Gefäße tindet, auf solche Vorderhornzellen zu- 



