1248 



HANDBOOK OF PHYSIOLOGY 



NEUROPHYSIOLOGY II 



LOWER FORMS 



HUMAN 



INTERMEDIATE 



VERM IAN 



VERMIAN 



INTERMEDIATE 



ANTERIO R 

 LOBE 





HEMISPHERAL 



FISSURA PRIMA]^ 



HEMISPHERAL 



P OSTERIOR 

 LOBE 





FLOCCULONODULAR 



! FISSURA POSTEROL A TERALIS 



LOBE 



Hi 

 FLOCCULUS 



NODULUS 



FIG. I . Highly schematized representation of the gross morphology of the mammalian cere- 

 bellum. The figure is intended to convey the relative positions of the various lobes, lobules and 

 sublobules along with their names. The lejl half of the figure is labeled according to the names ap- 

 plicable to mammals frequently used in experimental studies. The right half is labeled with names 

 applicable to the human cerebellum. The homologies are indicated by the names appearing on the 

 same horizontal line. The vertical lines indicate the separations of the anterior lobe into vermian and 

 intermediate portions, and the posterior lobe into vermian and hemispheral portions. The Roman 

 numerals indicate the system of nomenclature which has been proposed by Larsell (182) and which 

 is based upon the relations of the primary inedullary rays of the cerebellar white matter. Hemi- 

 spheral and intermediate portions of each subdivision are indicated by the prefixed H. There is con- 

 siderable unresolved confusion in the literature regarding the proper designation of the lingula in 

 the subhuman mammals. In the himian lobules I and H vary considerably in size. When lobule 

 I is much reduced in size, the correspondingly larger lobule II becomes the sublobulus centralis 

 anterior of Ziehen and has often been regarded as part of the centralis. [The original basis for this 

 figure was derived from the table presented in Jansen & Brodal (169). The modifications from the 

 original have been accomplished with the generous advice and assistance of Dr. O. Larsell.] 



