146 LECTURES ON THE CENTRAL NERVOUS SYSTEM. 



cerebellar lesions, a diagnosis is very difficult, and, as a rule, 

 uncertain. It is usually of great importance to take into con- 

 sideration the symptoms arising from neighboring organs 

 (paralysis of the oculo-motor, for instance). 



It seems to be a fact that the diseases which attack the 

 vermis are the ones which give rise to ataxy and vertigo. 



Most of those symptoms which are regarded as charac- 

 teristic of cerebellar disease only appear when the anterior or 

 median peduncles, or the floor of the fossa rhomboidalis, or the 

 quadrigeminal region are involved, either directly or indirectly. 



