THE SPINAL CORD AND CEREBELLUM 133 

 Dealing with this question, Ferrier relates many Perrier's 



, facts. 



interesting facts, amongst which the followmg are 

 some of the most noteworthy :* 



Flourens showed that recovery, even after deep 

 incisions into the substance of the cerebellum, was 

 a common occurrence, although complete removal of 

 the organ in birds was never followed by such 

 favourable results. In the latter case, whilst life may 

 be prolonged for several months, the symptoms of 

 cerebellar lesion are always present. t 



Sixteen days after Dalton had destroyed two-thirds 

 of the cerebellum of a pigeon he only noticed a general 

 debility and a slight difficulty in recovering itself 

 when it had alighted from flight.! 



Wagner observed complete recovery in a pigeon 

 which lived for twelve weeks after the removal of 

 more than half of the cerebellum. 



When, however, the corpora dentata were affected, 

 complete recovery did not follow. § 



Still more interesting is a case reported by Luciani, Luciani's 



oases. 



in which a dog is said to have survived the almost 

 complete removal of the cerebellum for eight months. 

 The remainder of the life of the animal has been 

 divided by that physiologist into three periods. The 

 symptoms during the first of these consisted in 

 inflammatory complications, spasms, and an excessive 

 weakening of the motor mechanism. These he 

 attributed entirely to the effects of the operation and 



* Ferrier, ' The Functions of the Brain,' pp. 174-219. 

 t Ibid., p. 177. I Ibid., p. 177. § Ibid., p. 177. 



