CEEEBRAL CORTEX AND VESTIBULAR NYSTAGMUS 13 



tagmus when the animal is rotated to the side of the lesion. 

 This marked increase is more or less temporary, but some increase 

 is permanent, as judged from animals kept eight months. 



The general conclusion is warranted that the quick component 

 of vestibular nystagmus is not due to the integrity of a cerebral 

 reflex arc, but is dependent upon some center below the thala- 

 mus, over which the cerebrum exercises its well-recognized inhibi- 

 tory influence. 



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