30 
PROFESSORS V. HORSLEY AND E. A. SCHAFER 
a very slight capacity to raise the left arm, and also ability to flex the left hip, when 
attempting to walk. The head and eyes can now also be moved to the left. 
Unfortunately the skin in this case sloughed, and the wound thus became partly open 
and septic, with the result that the animal died the fifteenth day after the operation. 
The eflect of the failure to maintain the antiseptic character of the wound was also 
apparent in the extension of the lesion, the edges and bottom of which were softened 
and disorganised so as to render the post-mortem condition of the brain of less value 
than in other cases in which no such extension occurred. We have, however, 
thought it worth while to reproduce the representations of it from both the outer 
and mesial aspects. It will be seen from these (figs. 15a, 15b, Plate 2) that the 
postero-parietal lobule is in part left, and also the posterior end of the marginal 
gyrus. The inferior border and the anterior end of the marginal gyrus also remain. 
Otherwise the whole of the motor areas upon the right side are destroyed. 
16. 
Lesion. — Removal at one operation of the marginal gyrus (its posterior three- 
fourths), ascending parietal, parietal lobule, ascending frontal and posterior half of 
transverse frontal convolutions on left side of brain. Lived seven days. 
Result. — Absolute right hemiplegia, both limbs and trunk being paralysed. Head 
rotated to same side. Face drawn over to right. Trunk arched, with convexity to 
right. Right leg is dragged, right arm drops from shoulder. Can support itself only 
by aid of left limbs. Drinks with paralysed side of mouth immersed in the fluid. No 
recovery observed up to time of death, which occurred on the seventh day. 
The brain is represented in fig. 16. It would appear as if part of the ascending 
parietal and the parietal lobule were not involved in the lesion, but in fact they were 
completely softened and undermined, so as to render it impossible to suppose that 
any part of them could have continued to perform its functions. The lesion of the 
marginal gyrus is very complete. 
17. 
Lesion. — Almost identical with that recorded of the preceding brain, but on the 
right side. The cortex of the whole frontal lobe, except the anterior fourth and a 
strip along the lower margin ; the ascending parietal convolution. The lesion is more 
complete at the upper and lower ends of this than in the centre, where only the 
part next the furrow of Rolando appears to be involved ; moreover it does not 
include the parietal lobule and the part of the marginal gyrus corresponding in 
longitudinal extent to the lesion upon the external surface. 
Result. — Absolute hemiplegia, as in 16, but of course involving the opposite side of 
the body. The hemiplegia was absolute, although the parietal lobule and the upper 
two-thirds of the ascending parietal were not removed, at least intentionally. But 
there was a partial softening and undermining in these convolutions, probably 
produced by the interference with their vascular supply which was caused by the 
