46 



STUDIES ON THE CENTRAL NERVOUS SYSTEM 



divided in several sublobi. Immediately behind the lobus 

 anterior the lobus simplex is found. A subdivision into a 

 middle and two lateral parts would also in this lobus be 

 artificial. But in the rest of the lobus posterior such a 

 distinction can be made. Bolk speaks of the lobus medianus 

 posterior, and the lateral parts. The latter are chiefly 

 composed of the lobi ansiformes. He mentions further a 

 lobus paramedianus and a formatio vermicularis at both 

 sides. 



This work of Bolk has had a great influence on the develop- 

 ment of the investigation of the structure and function of the 



Lobus 

 At^terior 



Sulcus 

 "^PriTnarius 



Lobus 

 Posterior 



Pars 

 Floccularis 



Lobus 

 Paramedianus 



Fig. 9. Scheme of the Cerebellum 

 (After Bolk) 



cerebellum, especially because he brought the principle of 

 localisation in the cerebellum to the foreground. This is 

 not a localization in a functional, but in a topographical 

 sense. There is only one function in the cerebellum, but 

 the various parts of the body must have a special localiza- 

 tion in the cortex of the cerebellum. 



van Rijnberk, Rothmann, Thomas and Durupt and others 

 have done much experimental work in that line and ad- 

 vanced arguments in favour of Bolk's views. 



After the above mentioned pubhcations Edinger, how- 



