DISEASES OF THE BUAIN AND NERVOUS SYSTEM. 85 



iractitioner or not, we shall borrow from analogy, in the intro- 

 daction of the following article from " Watson's Practice " : 



" In certain of M. jNIagcnclie's experiments on uiiinals, thi 

 following curious facts were ascertained: When a vertical section 

 of tlie cere])ellum of a rabbit was nuule, leaving one-fourth of the 

 whole adhering to the crest of the right side of the cranium, and 

 ihrec-fourths to that of the left, the animal rolled over and ever 

 incessantly, turning itself toward the injured side. The same phe- 

 nomenon occurred u])on the division of the cms cerel)elli. The 

 animal lived for eight days, and continued, during the whole of 

 thai time, to revolve upon its long axis, unless stopped by coming 

 in contact with some obstacle. Plow like is this to the symp- 

 toms exhibited at one period in the girl whose case is related by 

 Dr. Watts. Xor is Dr. Watts's case a singular one. M. Serrea 

 has described another much resembling it. A shoemaker, sixty- 

 eight vears 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. Magemlie noticed that when the 

 upper part of the cerebrum is gently removed in birds and mam- 

 malia, tiny become blind; but no affection of the locomotive 

 powers is produced. Xo further result is occasioned by the removal 

 of a portion of the gray matter of the corpora striata ; but when 

 tlie striated part is cut away, the animal immediately darts forward 

 with rapidity, and continues to advance as if impelk'd by some 

 irresistible force, until stopped by an obstacle; and, even then, it 

 retains the attitude of one advancing. The exi)eriment was tried, 

 with the same results upon various s])ecies of animals — dogs, cats, 

 hedgehogs, rabbits. Guinea-pigs, and squirrels. It seems that 

 there are horses that can not back, although they make good 

 progress enough in a straightforward direction. Now, Magcudie 

 Bays that he has opened the heads of such horses, and has always 

 found in tlie 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- 

 mals to move backward contrarilv to their will. If the tail of 



