518 
PROFESSORS D. FERRIER AND G. F. YEO ON THE EFFECTS OF 
be reached without actually exposing the extreme upper and lower extremities of 
these convolutions. 
An hour after the operation the animal, in trying to move, fell over on the right 
side, the right arm and leg appearing quite helpless. At this time heat applied to the 
fingers and toes of the right and left side respectively caused equal signs of uneasiness. 
Hearing and vision were unimpaired, the animal responding to sounds, and making 
gestures when approached. 
Next day the right hemiplegia was very pronounced, the animal dragging the 
right limbs, moving on with the aid of the left hand and foot. There was visible, 
when the animal was drinking from a dish, a tendency of the head to the left side. 
At the same time also the eyes tended to the left. The animal was, however, able to 
move the eyes towards the right, but at rest they maintained a slight deviation 
towards the left side. 
The right angle of the mouth was somewhat more open, and drooped a little, as 
compared with the left. 
On the sixth day the animal was more active and more willing to move about than 
before. There was still some tendency to deviation of the head to the left, and the 
eyes did not seem to move so well to the right as to the left. 
The animal was able to mount on its perch with the aid of its left hand and foot. 
It had great difficulty in getting its right foot on to the perch, but succeeded 
ultimately by hitching movements of its trunk. Slight power of flexion of the 
thigh and leg was visible. 
During struggles also the right forearm would flex a little. The hand was not 
moved, and when the animal was at rest the arm was kept by the side semiflexed, 
and the fingers flexed over the thumb. 
Slight weakness of the right facial muscles was still perceptible. 
On the ninth day no tendency of the head or eyes to the left could be discovered, 
but the defective action of the right side of the mouth was still very perceptible when 
the animal grinned. With the exception of some power of flexion of the right thigh 
and leg, the right lower extremity was helpless. In struggling some shoulder move¬ 
ments of the right arm and flexion of the forearm occurred, but no volitional use of 
this arm was seen. The right patellar reaction was more distinct than the left. 
On the fourteenth day the condition of the limbs was essentially the same, but 
the facial paralysis on the right side was not very perceptible, though food seemed to 
accumulate more readily in the right cheek-pouch than the left. 
Tin ■ee months after the operation the animal, in moving about, was able feebly to 
flex the right thigh and leg so as to lift the foot clear of the ground, but the foot had 
not moved on the ankle. It carried the right arm by the side semiflexed ; occa¬ 
sionally, in struggling with the left side, making some shoulder movements of the 
right arm, and slight flexion of the right forearm. Occasionally also the fingers of the 
right hand were seen to flex under the same circumstances, viz.: associated with 
