xxx Journal of Comparative Neurology. 



Spinal Cord and Nerves," by Dr. Lewis S. Pilcher, of Brooklyn, and 

 Dr. Samuel Lloyd, of New York, " Traumatic Neuroses," by Dr. J. 

 A. Booth, New York. 



Lesions of the Cerebellum in Monkeys. 1 



The most noteworthy features of complete extirpation of the cere- 

 bellum were the extraordinary disturbances of station and locomo- 

 tion, and the long-continued and apparently persistent unsteadiness of 

 the trunk and limbs on muscular effort. There were noted, also, from 

 the first, absence of tonic flexion or contraction of the limbs ; reten- 

 tion of great and, apparently, unimpaired muscular strength, as evi- 

 denced by the firmness of the grasp of the hands and feet, and the 

 agility in climbing ; and the presence, with ultimate exaggeration, of 

 the knee-jerks. There was no impairment of the general or special 

 sensibility, or disturbance of the organic functions. 



The symptoms observed after extirpation of a lateral lobe, after 

 the first tumultuous disturbance of equilibrium had passed off, were 

 similar to those observed after complete extirpation, with the impor- 

 tant difference that they were confined to the limbs on the side of le- 

 sion. Except in one case, where it was only present to a slight extent, 

 there was no impulsive tendency to rotation. 



Extirpation of the middle lobe, including antero-posterior divis- 

 ion, produced, in general, the same symptoms as were observed in 

 connexion with removal of the whole organ and of the lateral lobe, but 

 they did not affect one side more than the other, and were more pro- 

 nounced in the head and trunk than in the limbs. 



The symptoms following section of the cerebellar peduncles were 

 similar to those occurring after removal of the lateral lobe, the chief 

 difference being the greater tendency to roll round the longitudinal 

 axis towards the side of lesion, whichever peduncle was cut. 



Destruction of the clavate and cuneate nuclei caused temporary 

 disturbances of attitude and gait, but there was no affection of cutan- 

 eous sensibility. 



The degenerations following removal of the lateral lobe of the 

 cerebellum, or section of the superior peduncle, showed that this 

 structure contains an efferent tract to the opposite red nucleus and op- 



X A Record of Experiments illustrative of the Symptomatology and Degen- 

 erations following Lesions of the Cerebellum and its Peduncles and related 

 Structure in Monkeys. Proc. Roy. Soc, LIV, 330. 



David Ferrier and W. Alden Turner. 



