IV. Pathological Observations on the Brain. 

 By Mr Thomas Anderson^ F.R. S. Edtn. Surgeon at 

 Leithy and Fellow of the Royal College of Surgeons *. 



TH E following obfervations may ferve to illu urate and 

 confirm the opinion now very generally adopted by Ana- 

 tomifts and Phyficians, That an affection of one hemifphere of 

 the brain, whether from internal difeafe or external accident, 

 produces its morbid fymptoms on the oppofite fide of the body. 



Case i. A lady about forty, whom I attended along with 

 Dr Monro, was for many years affected with violent headachs; 

 fhe complained of the pain being moft violent in the crown of 

 her head, which at lafl brought on convulfive tremors of the left 

 arm and leg ; thefe often continued half an hour, and would 

 return three or four times a-day \> the fits grew more fevere and 

 frequent, and the right fide became affected, and frequently 

 fhe was comatofe for twenty-four hours, till, quite worn out, 

 fhe died in November 1770. 



On opening her head, when the dura mater was taken off, 

 on the right hemifphere of the brain, there was a lofs of fub- 

 ftance, for about two inches and a half in length, one and a 

 half in breadth, and about the middle near an inch deep, the 

 length of which was in the direction of the falx : In the middle 

 of this, immediately under the coronal future, and on the fide 

 nearefl to the falx, within an inch of it, there was fome foft 



Vol. II. c brownifh 



* Read, before the Philofophical Society of Edinburgh in 1781; and now printed 

 by order of the Committee for publication of the Tranfaclions of the Royal Society of 

 Edinburgh. 



