FUNCTIONS OF THE CEREBELLUM. 385 



that night, but the nausea and vomiting stopped in the 

 course of a few hours. 



" The next day he attempted to walk, but was obliged to 

 desist on account of the vertigo. ' He felt,' he said, ( as if 

 he were drunk,' and he staggered just like a drunken man. 

 This feeling of vertigo continued for several weeks, lasting 

 all through the period of suppuration. Gradually it disap- 

 peared, though even after the lapse of a year he felt giddy 

 on making any unusual exertion. At no time was there any 

 difficulty in coordinating the muscles of the upper or lower 

 extremities. The latter were simply affected through the ver- 

 tigious sensation. The sensibility was unaffected through- 

 out the whole progress of the case. 



CASE XVI. " The other case was that of a man who, for 

 several months, had suffered with vertigo, occasional con- 

 vulsions, attacks of nausea and vomiting, and a constant and 

 violent pain affecting the back of the head. These symp- 

 toms had come on subsequently to a severe blow which he 

 had received on the back of the head, in consequence of 

 raising himself too soon while the horse he was riding was 

 passing under a low archway. 



" When this man attempted to walk he reeled and stag- 

 gered as if he were drunk, but his movements were very 

 different from those which we now recognize as character- 

 izing locomotor ataxia. The upper extremities, and the or- 

 gans of speech, were not affected ; he had the entire control 

 of his legs when lying down, and there was no diminution 

 of sensibility anywhere. At last he became paraplegic, and 

 died in a convulsion. The post-mortem examination showed 

 the existence of an abscess, which had obliterated nearly the 

 whole of the left lobe of the cerebellum." 



The interpretation of these two cases depends, apparently, 

 upon the ideas concerning the functions of the cerebellum, 

 with which they are regarded. We should consider them 

 as very strong evidence that the cerebellum regulates equi- 

 libration and muscular coordination. Prof. Hammond re- 



