LESION OE DIFFERENT REGIONS OF THE CEREBRAL HEMISPHERES. 487 
more evident when the other angular gyrus has been more extensively destroyed some 
time previously. (See Experiment 5*.) The absolutely negative character of the 
subsequent extension of the lesions into the anterior parts of the occipital lobes was 
also a remarkable fact in this case. 
Experiment 5* (Plate 20, fig. 7). 
In this animal the left angular gyrus was exposed in the usual manner, and caute¬ 
rised with the galvanic cautery. 
The left eye was secured, and the animal allowed to recover from stupor. 
At the end of half an hour it was evidently wide awake but would not move unless 
touched. At this time it was removed from its cage and placed on the floor, where¬ 
upon it began to grope about in a sprawling manner, knocking its head against every 
obstacle in its path. After some minutes of this behaviour it subsided and refused to 
move. It made no sign of fear at threatening gestures, and did not wink at a thrust 
of the finger at its eye, until the finger almost quite touched the conjunctiva, when 
the usual reflex closure occurred. 
Half an hour later the same tests were employed with precisely the same indications 
of total loss of vision. 
At the end of still another half hour, while it was lying quietly in its cage, it was 
gently laid hold of without noise to attract its attention, whereupon it bounded away 
with an expression of fear or surprise, and ran full tilt against the leg of a table where 
it remained groping and sprawling for a few moments. It then again started off, and 
this time ran against the wall, against which it sprawled helplessly. Similar things 
w r ere repeated. 
It gave no sign of perception when it was cautiously approached without noise, but 
when a slight noise was made with the lips quite close to it, it darted off and came 
against the wall as before, where it lay down. 
Half an hour later, while it was resting quietly in a corner with its eye open, the light 
of a lantern was flashed in its eye, but it gave no sign. Creeping up to it cautiously 
without exciting its attention the observer made a slight whisper close to its face, 
whereupon it peered eagerly, but evidently remembering the results of running away, 
it crouched down and would not move. 
Half an hour later, when it was quiet in its cage, it started suddenly on being 
touched and ran its head into a corner, where it crouched. 
Next day, its left eye being still closed, it showed unmistakably the possession of 
vision with the right eye. It laid hold of things as usual, and ran about the labora¬ 
tory in every direction, passing obstacles to the right and left with perfect precision, 
and ducking its head to pass underneath bars as it ran along the top of the hot-water 
pipes of the laboratory. 
No defect of vision, amblyopic or hemiopic, could be detected. The animal was in 
