8'so 



A MANUAL OF PHYSIOLOGY 



Some interesting observations have been made on a monkey, 

 which was carefully watched for eleven years after the removal 



Pof. 



FIG. 354. MESIAL SURFACE OF LEFT HEMISPHERE OF MACAQUE MONKEY 



(HORSLEY). 



by two operations of the cortex of the greater portion of the 

 frontal and parietal lobes on the left side. The character of 

 the animal, which had been studied for months before the 



FIG. 355. CEREBRAL CORTEX : MAN (SEEN FROM ABOVE). 



The front of the brain is towards the right. The dotted line shows the position 

 of the fissure of Rolando, as fixed by Thane's rule (p. 856). 



operations, wa? entirely unaffecteci. All its traits remained un- 

 altered. There was no loss of memory or intelligence. On the 



