452 PHYSIOLOGY CHAP. 



or the whole of the cerebellum, there are a number of intermediate 

 forms, due to partial and more or less extensive, symmetrical, or 

 asymmetrical lesions of this organ, which can more often be 

 observed because it is much easier to keep alive animals with 

 partial mutilations of the cerebellum. 



The most important difference between the typical forms of 



Fio. 237. Gait of a bitch of 6000 grms. in which the two lateral halves of the cerebellum 

 were divided by a vertical cut, much of the grey matter of the vermis being lacenttrd. 

 (Luciani.) a, tracing before the operation ; b, four days after operation ; c, live days after ; 

 d, a month after ; c, two months after. 



ataxy described above and these intermediate forms consists in 

 the fact that while the former improve but little, and persist 

 throughout the animal's life, the latter improve progressively 

 until they become latent, i.e. there is a true organic compensation, 

 which gradually makes the various forms of functional compensation 

 superfluous. 



The tracings in Fig. 237 were taken from an adult bitch in 



