CH. 1.] 



NATURE OF IMPRESSIONS. 



221 



jents in the body, especially by reflected external impressions 

 rhich are not felt, may induce all these affections quite inde- 

 mdently of the brain, and must be cured by the removal of 

 lese agents. 



It is manifest, too, with what justice we have controverted 

 le doctrine of Haller, that the motor force of the nerves can 

 leither arise nor continue independently of the brain, and how 

 )rejudicial such views must be to pathology and the practice of 

 nedicine, especially when advocated by so eminent a physio- 

 logist. It has simply escaped his notice, however, for it could 

 be shown by a hundred passages in his writings that the truth 

 was known to him. 



