TUMOUR IN THE LATERAL VENTRICLE. 
17 
symptoms which the various lesions present to us in living 
animals; and although I have never resorted to vivisection, 
to satisfy myself of the absolute facts produced by lesions of 
the more important parts of the brain and nervous system, 
nevertheless I do not acquiesce in the wholesale censure of 
those that have. I think that, provided the painful sacrifice 
of a few animals, as rabbits, puppies, and pigeons, may now, 
or at any future time, lead to the means of alleviating pain 
and anguish in man and animals, the sin committed bv the 
vivisection is worthy of atonement. The abuse of vivisection 
I disclaim and renounce. Facts once ascertained and made 
known, upon good authority, are quite sufficient for all the 
purposes of vivisection; and further sacrifice of animal life 
in this manner is quite unnecessary. 
Now let us see what are the results of some of the lesions 
thus produced. We feel satisfied the faculties of sense, 
volition, and intellect, reside in the cerebrum. What the 
faculties are over which the cerebellum presides are not very 
clear, but I think there is little doubt of voluntary motion 
being the principal one. Injuries from wounds, or concus¬ 
sion of the cerebellum, cause the animal to go backwards; 
and, if the corpora striata are wounded, the animal rushes 
forwards. This is very remarkable, as regards the cerebrum 
and cerebellum. If the crura of the cerebellum is divided, 
on one side only, the animal rolls over and over ; the eye of 
the same side is directed upwards, and the other strongly 
downwards. This effect of the division of one crura of the 
cerebellum is very remarkable, as the nerves supplied to the 
muscles that perform these movements of the eye are from 
the cerebrum. It is true there is a connecting commissure 
betwixt the quadrigemina and the cerebellum, which offers a 
little explanation. But that both eyes should be distorted in 
directions the exact reverse of each other, is singularly con¬ 
fusing to our views of the cerebral functions, and shows hoyv 
uncertain the conclusions drawn from dissections are. When 
one of the corpora striata is removed, the animal, as he ad¬ 
vances, turns towards the opposite side ; but not invariably, 
as he will occasionally turn to the side injured. If both are 
removed, the animal ceases to turn round. These results 
prove that both the cerebrum and the cerebellum are con¬ 
cerned in the action of the voluntary muscles; the cerebrum 
in willing and directing volition, and the cerebellum in the 
control and regulation of it. When one of the thalami is 
removed, the animal turns to one side as he advances, or 
rather falls on the injured side: if both thalami are removed, 
he falls, lies motionless, and is unable to stand. When the 
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