267 



ON THE 



INFLUENCE EXERCISED IN HEALTH AND DIS- 

 EASE UPON THE SENSORIAL FUNCTIONS OF 

 THE CEREBRO-SPINAL NERVES 



BY THE 



STATE OF THE CIRCULATION IN THE ADJACENT 

 BLOOD-VESSELS. 



AMONG the conclusions most generally received 

 respecting the physiology and pathology of the 

 nervous system are the following : - 



That the brain as the organ of the mind, can alone 

 receive the impressions of sensation and originate 

 those of volition. 



That the gray matter of the brain is the active 

 seat of its functions, and that its white fibrous por- 

 tion is merely the conductor of those impressions to 

 and from the former. 



That the continuance of the functions of the brain 

 is dependent on a constant and due supply of healthy 

 arterial blood to the minute vessels of the organ. 



That irregularities in the quantity, and deteriora- 

 tions in the quality, of the blood transmitted to the 

 brain will produce various disorders in its functions. 



That the gray matter of the spinal cord is the 

 great source of motific power ; but that the excito- 



