DE. D. FERRIEE ON THE BRAIN OE MONKEYS. 
469 
4.30 p.m. The reaction to heat was again tried. A hot iron is allowed to remain in 
contact with the right side without causing any reaction, except when kept so long as to 
burn the part, while the slightest contact with the right side causes violent reaction and 
active rubbing of the part. This was observed on the ear, hand, and foot. 
There is no facial distortion. 
5.45 p.m. On being placed in its cage the animal mounted its perch with difficulty, and 
sat unsteadily with its head down. On turning its body a little the left leg slipped off 
the perch. The animal, in recovering itself, clutched hold of the bars of the'cage with 
its right hand, and though the left was placed on the bars no grasp was made with it. 
Aided by its teeth and the right hand, it ultimately regained its equilibrium, and 
dragged up its left leg, after having fairly got hold of the perch with its right. 
Sits now holding on firmly to the perch with the right foot. 
After this, on the animal shutting its eyes and going to sleep, the left foot frequently 
slipped off, causing sudden grasping with the right hand on the cage until it recovered 
its equilibrium. 
8 p.m. The anaesthesia of the left side being again firmly established, and the animal 
being otherwise well and apparently in possession of all its other, senses, the animal was 
killed with chloroform, in order to avoid complication by the extension of the lesion. 
Post mortem Examination . — The exposed surface of the right occipital lobe was 
slightly congested. The surface of the brain, except at the point of entry of the cautery, 
was everywhere else normal. There was no effusion within the skull. There was 
injection of the vessels of the dura mater in the right sphenoidal fossa and over the 
region of the Gasserian ganglion, extending from an inflamed spot with which the point 
of the wire had come in contact. 
The base of the brain and cranial nerves were normal in appearance. The crura, the 
corpora quadrigemina, the optic thalami, corpora striata, pons, and medulla were unin- 
jured and normal in appearance. 
The cerebellum was just grazed on its right upper lobe, where the cautery had come 
in contact with the tentorium in its course. 
The track of the cautery was clearly traceable. It had penetrated the right occipital 
lobe just at the posterior extremity of the superior occipital sulcus. Here there was a 
round hole with blackened edges, about a quarter of an inch in diameter. 
Emerging on the under surface of the lobe, the track appeared as a deep furrow, com- 
mencing at the posterior termination of the calcarine fissure, and running along the 
uncinate gyrus for about an inch. Thence following a concealed course below the surface 
of the uncinate convolution, which yielded to pressure, it emerged at the tip of the 
temporo-sphenoidal lobe on the orbital aspect of the lower end of the superior temporo- 
sphenoidal convolution, two lines external to the subiculum cornu ammonis. On cross 
section of the lobe it was found that the cautery had ploughed along the hippocampus 
major. 
The track of the cautery was followed with precision by the discoloration caused. 
