DISEASES OF THE BRAIN AND NERVOUS SYSTEM. 84 
{ractitioner or not, we shall borrow from analogy, in the iutye- 
duction of the following article from “ Watson’s Practice” : 
“Tn certain of M. Magendie’s experiments on animals, the 
following curious facts were ascertained: When a vertical section 
of the cerebellum of a rabbit was made, leaving one-fourth of the 
whole adhering to the crest of the right side of the cranium, and 
three-fourths to that of the left, the animal rolled over ana over 
incessantly, turning itself toward the injured side. The same phe- 
uomenon occurred upon the division of the crus cerebell1 The 
animal lived for eight days, and continued, during the wnole of 
that time, to revolve upon its long axis, unless stopped by coming 
in contact with some obstacle. How like is this to the symp- 
toms exhibited at one period in the girl whose case is related by 
Dr. Watts. Nor is Dr. Watts’s case a singular one. M. Serres 
has described another much resembling it. A shoemaker, sixty- 
eight years old, of intemperate habits, after one of his debauches, 
exhibited a kind of drunkenness which surprised his friends. 
Instead of seeing objects turning around him, as a drunken person 
is apt to do, he thought he was himself turning, and soon began 
to revolve, and this lasted till he died; and when his head was 
examined, extensive mischief was found in one of the pedicles of 
his cerebellum. Again: M. Magendie noticed that when the 
upper part of the cerebrum is gently removed in birds and mam- 
malia, they become blind; but no affection of the locomotive 
powersis produced. Nofurther result is occasioned by the removal 
of a portion of the gray matter of the corpora striata; but when 
the striated part is cut away, the animal immediately darts forward 
with rapidity, and continues to advance as if impelled by some 
irresistible force, until stopped by an obstacle; and, even then, it 
retains the attitude of one advancing. The experiment was tried, 
with the same results upon various species of animals—dogs, cats, 
hedgehogs, rabbits, Guinea-pigs, and squirrels. 1t seems that 
there are horses that can not back, although they make good 
progress enough in a straightforward direction. Now, Magendie 
says that he has opened the heads of such horses, and has always 
found in the lateral ventricles of their brains a collection of water, 
which must have compressed and even disorganized the corpora 
striata. It has been further ascertained, by the same experimenter, 
and by others, that certain injuries of the cerebellum cause ani- 
mais to move backward contrarilv to their will. If the tail of 
