DR. D. TERRIER ON THE BRAIN OE MONKEYS. 
473 
Active reaction followed the application of a hot wire to the left side, hand, foot, 
and ear. 
No reaction followed application of the iron to the same points on the right side. 
3.24 p.m. Begins to move about, turning towards the right side. When placed on the 
back of a chair the animal clung tenaciously with the left hand and foot, but did not 
grasp with the right. 
The right side is completely ansesthetic. The animal, though keeping its right eye 
open, apparently does not see, as it runs its head against obstacles in its way. When 
placed on a chair it tumbled off, with its eye open. Muscular resistance is considerable 
in the limbs of the right side. There is no trace of facial distortion. 
3.40 p.m. Can flex and extend the right leg. Does so when lying down and in trying to 
get up. Does not move the right limbs in walking, but drags them after the left. Turns 
about aimlessly, and knocks its head against furniture &c. Sometimes goes backwards. 
There is no reaction on the right side, but active on the left to hot iron. 
3.55 p.m. The animal was placed on the floor, and surrounded by a circle of battery- 
jars. It turned round and round, knocking its head against them, and apparently unable 
to find its way out between them. 
The bandage was then removed from the left eye. The animal still remained quiet 
for a few minutes. When placed on the back of a chair, it quickly found its way down. 
When placed beside its cage it looked about and then went in. Sight was therefore 
improved or restored since the removal of the bandage. 
5 p.m. The animal was observed to flex the right arm and partially close the fist while 
it was sitting still. Entire abolition of reaction still continues in right. After some 
minutes the animal seemed to be animated by all its former vivacity. Ate and drank 
heartily. Makes active movements, turning round and round frequently to the left, 
using its left limbs only. 
At 5.30 p.m. the animal was chloroformed 
to death, so that the exact seat of the lesion 
Post mortem Examination . — From the open- 
ing in the skull below the parietal eminence 
there was a hernia cerebri involving the upper 
part of the middle temporo-sphenoidal, annec- 
tent gyrus, and lower part of the angular, and 
upper end of the superior temporo-sphenoidal 
convolution (see fig. 25). 
In the centre of this was an opening, almost 
circular, with softened edges, indicating the 
point of entrance of the cannula. The surface 
and base of the brain were everywhere else 
normal. The cranial nerves were intact. 
mdccclxxv. 3 R 
Pig. 25. 
Pig. 25 represents by the shading the area of 
superficial injury of the left hemisphere of the 
monkey in Experiment XIX. The dark central 
shading indicates the orifice of the wound leading 
into the optic thalamus. 
