CHAPTER XIII. 



THE CEREBELLUM. 



Some points in the physiological anatomy of the cerebellum Course of the 

 fibres in the cerebellum General properties of the cerebellum Functions 

 of the cerebellum Extirpation of the cerebellum in animals Incomplete 

 extirpation of the cerebellum Pathological facts bearing upon the func- 

 tions of the cerebellum Andrei's cases Other cases of disease of the 

 cerebellum Connection of the cerebellum with the generative function 

 Development of the cerebellum in the lower animals Paralysis from disease 

 or injury of the cerebellum. 



IT is not necessary, in order to comprehend the functions 

 of the cerebellum, as far as these are known, to enter into a 

 full description of its anatomical characters. The points, in 

 this connection, that are most interesting to us as physiolo- 

 gists are, the division of the substance of the cerebellum into 

 gray and white matter ; the connection between the cells 

 and fibres ; the connection of the fibres with the cerebrum, 

 and with the prolongations of the columns of the spinal 

 cord ; and the passage of fibres between the two lateral 

 lobes. These points, therefore, will be the only ones that 

 will engage our attention. 



o o 



Some Points in the Physiological Anatomy of the Cere- 

 bellum. 



As we have seen, in treating of the general arrangement 

 of the encephalon, the cerebellum, situated beneath the pos- 

 terior lobes of the cerebrum, weighs about 5*20 ounces av. 

 in the male, and 4- TO ounces in the female. The propor- 



