384 NERVOUS SYSTEM. 



left hemisphere of the cerebellum ; the walls of this cavity, 

 which contained several tablespoonfuls of pus, were soft- 

 ened. 



" As M. Bouvier remarks, a circumstance of great inter- 

 est connected with this case is the entire absence during life 

 of any symptoms indicating an augmented sensibility, loss 

 of equilibrium, or excitation of the genital organs." x 



With regard to this case, it is evident that the disease of 

 the cerebellum was of slow development and did not involve 

 enough of its substance to necessarily interfere with its func- 

 tions, as has been clearly shown in other pathological cases 

 and in experiments upon animals. 



Prof. Hammond also reports two interesting cases which 

 came under his own observation. 2 



CASE XY. " In 1851, a Mexican shepherd was attacked 

 near Cebolleta, in !N"ew Mexico, by Navajo Indians. He 

 managed to escape, but in fleeing from his enemies received 

 an arrow-wound in the posterior part of the head. He was 

 on horseback, and, though stunned by the blow, maintained 

 his seat in the saddle. So firmly was the arrow implanted 

 that the shaft became detached by his efforts to remove it, 

 leaving the head of the weapon in the skull. I saw him 

 about two hours subsequently. He was then in full posses- 

 sion of his senses and was suffering no pain. There were, 

 however, constant vertigo and nausea, together with a sen- 

 sation, as he described it, as if his head were balanced on a 

 very delicate point, and the least inclination to one side 

 or the other would cause it to fall off. On examining the 

 wound, I found the arrow still sticking in the bone, and I 

 had to use considerable force before I could remove it. It 

 had entered to the extent of an inch and a half a little be- 

 low and to the left of the occipital protuberance wounding 

 the left lobe of the cerebellum. The vertigo continued all 



1 HAMMOND, The Physiology and Pathology of the Cerebellum. Quarterly 

 Journal of Psychological Medicine, New York, 1869, vol. iii., p. 237. 

 8 Loc. crit. 



