50 STUDIES ON THE CENTRAL NERVOUS SYSTEM 



These findings gave me the idea, that both these accessory 

 oUves must send their fibres to the palaeocerebellum and 

 by far the greatest part of the principal ohve to the neo- 

 cerebellum. Hence it was necessary to divide the inferior 

 ohves into an older (palaeo-) and a newer (neo-) part. I 

 was fortified in this idea, through studying brains of mon- 

 keys, dogs, cats and rabbits, where the principal olive is 

 relatively small and the accessory olives comparatively 



Casel 



(m\.. 



St 



<Z* iO~! 





Medio- vMLral 



acMsaory 

 olive. 



CkUkl. 



Fig. 13. Degeneration op the Inferior Olives in Two Cases of 



Neocerebellar Atrophy 

 Striped = degenerated = neocerebellar. Black = normal = palaeo- 

 cerebellar. 



large. Besides, in studying the human foetus I found that 

 these accessory olives are connected with the cerebellum 

 by a special bundle, which I called the tractus parolivo- 

 cerebellaris. This bundle is medullated much earlier than 

 the rest of the tractus olivo-cerebellaris. 



Careful investigations in comparative anatomy by Kooy 

 and by Brunner have shown, that the medio-ventral 

 accessory olive is the oldest part of the olive system, that 



