560 
PROFESSORS D. FERRIER AND G. F. TEO ON THE EFFECTS OF 
heat which caused lively signs of pain on the left side evoked scarcely any indication 
of perception on the right. 
Tickling the interior of the left nostril caused a grimace and a snort, but the same 
on the right very slight, if any, effect. 
An hour later the animal, in walking, which it did more freely, frequently fell over 
on the right side owing to the awkward way in which the right limbs were planted. 
There was no motor paralysis of the right limbs however, and the animal was able 
to grip with the right hand and raise the right arm to the head, 
Tickling the left nostril invariably caused the animal to raise its hand and rub the 
part, but no notice was taken of the same thing on the right. 
Next day the animal was seen to run about without any tendency to fall over on 
the right side, and the right limbs were used in a perfectly normal manner. 
Tactile sensibility was in great measure restored, there being only defective sense of 
mere contact on the right side, but no longer any distinct analgesia. Hearing was 
undoubtedly retained in the right ear, but there was total loss of vision to the right 
side. The animal at once seized a piece of food as soon as it crossed the middle line 
when moved from right to left in front of it. 
O 
On the fourth day, except for the right hemiopia, nothing abnormal could be 
detected. 
The animal continued, except for the right hemiopia, which was absolute, in 
perfect health, and at the end of a fortnight the right hemisphere was exposed over 
the region of the incisura prse-occipitalis. 
At the anterior extremity of the inferior occipital convolution, where it joins the 
middle temporo-sphenoidal, a wire cautery was run along the middle temporo- 
sphenoidal convolution downwards and forwards to its extremity, and at right angles 
to this incision, another was carried inwards with a view to divide and detach the 
inferior temporo-sphenoidal and hippocampal region from the rest of the hemisphere. 
The parts were not removed, but along the bottom of the incisions a porte caustique 
tipped with nitrate of silver was rubbed, with a view to excite destructive inflamma¬ 
tion and adhesion, and so obviate haemorrhage. 
The animal had for a short time after the operation some twitching of the limbs, 
particularly of the left side. 
Within two hours after the operation the animal was quite recovered, and was wide 
awake ; but in trying to sit up or move always fell over on the left side. 
At this time a heated point caused barely any sign of reaction on the left side, 
whereas the same on the right caused very distinct signs of sensation and attempts to 
rub the part with the hand. 
No further observations were made on that day, and next morning the animal was 
found quite recently dead. 
Post-mortem examination .—On examination of the brain there was no sign of 
inflammation or recent haemorrhagic efiusion. 
