ON THE FUNCTIONS OF THE CEEEBRAL CORTEX. 
25 
Result. — No perceptible permanent symptoms were produced. 
This animal was kept nearly three months. 
The brain is represented in fig. 2, Plate 1, as seen from above. 
3. 
Lesion. — The same as in the previous case. 
This animal did not properly recover from the result of the operation, for death was 
caused on the sixth day apparently by compression of brain from accumulated serous 
fluid. Up to the fourth day no abnormal symptoms were presented (with the 
exception of the peculiar attitude before mentioned as characteristic of these lesions 
(p. 3), which was exhibited also for the first few days by Monkeys 1 and 2). 
The brain is represented in fig. 3, Plate 1, as seen from above. 
4. 
Lesion. — Left ascending frontal and ascending parietal gyri removed by galvanic 
cautery,* except the lowermost part. The ablation includes also most of the parietal 
lobule and a part of the superior frontal convolution. 
Result.^ — Bight arm is kept flexed at elbow, and adducted and rotated forwards at 
shoulder.| Hand hangs down with fingers nearly straight ; no movements of hand. 
Slight movement possible at elbow (re-flexion after being straightened) and at shoulder 
joint. Right leg is kept flexed at hip, knee, and ankle ; some amount of movement is 
possible at all these joints. Toes remain semiflexed. It is difficult to detect facial 
paralysis, but the right cheek pouch cannot be emptied without the assistance of the 
hand or by being pressed against the shoulder. No paralysis of trunk perceptible. 
No impairment or paralysis of head-movements was noticed. Lived four months 
after operation. Death from diarrhoea. 
The brain of this Monkey is shown in fig. 4, Plate L 
5. 
Lesion. — Of very nearly the same character and extent as in 4, but upon the right 
side of the brain. 
The symptoms produced were almost exactly the same as in 4, except that there 
was much less paresis of the leg-movements. When in active motion, all four limbs 
may occasionally be used, but the movements of the left arm are very imperfect, and 
* In this and a few other experiments the cautery was used to efEect the removal of the cerebral 
substance. In all other cases we simply cut the part away with a sharp Icnife. 
t In all cases, unless otherwise expressly stated, the symptoms which are given are those which are 
manifested after recovery from the immediate effects of the operation and complete healing of the wound 
involved in performing it. In all cases also it may be assumed that the symptoms persisted until the 
death of the animal, unless the contrary is noted. 
X This position may have been due to contracture. 
MDCCCLXXXVIII. — B. E 
