THE FORE-BRAIN 



621 



They showed a lively interest in a mirror placed before them ; 

 they were greedy for fruit and still more for sugar, which they 

 sought in the pocket where they had learned to find it ; they were 

 on good terms with their attendant, and behaved differently to 

 the people they knew and to strangers. If disturbed by threats 

 or noises they tried to escape as far as possible ; but allowed 

 themselves to be touched and caressed; they never showed un- 

 reasonable fear or anger. 



Fio. 307. C, olfactory sphere ; D, somo-aesthetic or sensory-motor sphere of dog's cerebral cortex. 

 Diagrammatic. (Luciani.) 



After killing both monkeys under chloroform, the Committee 

 examined their brains. It seemed at first as if but little of the 

 frontal lobes had been removed, but from an accurate report 

 published by Cerletti, the frontal pole, which is pronounced and 

 bulges forward in the macaque, was entirely absent, while the 

 rest of the pre-frontal lobe was occupied by cicatricial tissue, so 

 that in both monkeys the whole of the pre-frontal lobes had been 

 thrown out of function. 



Clinical experience also militates against the theory which 

 ascribes special value in regard to mental functions to the pre- 

 frontal lobes. Many cases have been described in which lesions 

 of the anterior frontal region have not been accompanied 



