502 THE FUNCTIONAL RELATIONS OF THE 



highly advantageous, if not absolutely necessary, for 

 animals in whom Conscious Intelligence obtains a high 

 development, that their principal motor centre, the Cere- 

 bellum (and, for the present, we assume it to be some 

 such organ), should be in relation with the various ' in- 

 going' nerves of the body and with their corresponding 

 nerve centres, from the lowest to the highest or, at all 

 events, from some of the lower to the highest. 



By its connection with the highest ' sensory ' centres, 

 namely, those of the cortical grey matter of the Cerebrum, 

 the Cerebellum would be enabled (a) to take part in Volun- 

 tary and all other Movements which follow (immediately or 

 remotely) the instigation of Conscious Impressions ; and 

 by its connection with lower centres of different grades, 

 it would be enabled (Z>) at the instigation of ' unfelt ' 

 Impressions, to take a much larger share in the production 

 and maintenance of complex ' automatic ' and ' secondary- 

 automatic' Movements generally just such a share, in 

 fact, as the lower spinal motor centres take in the execu- 

 tion of spinal 'reflex' Movements.* 



The mechanism of Voluntary Movements will be subse- 

 quently referred to. It is only needful here to point out 

 that ' Volition ' proper is inseparable from Sensorial 

 Activity, Intelligence, and Eeason, so that the starting 

 points of Volitional * stimuli ' must be somewhere in the 



* In an animal like the Frog, in which the Cerebellum is very 

 small and ill-developed, even movements of locomotion are capable 

 of being executed under the guidance of the Spinal Cord alone. It is 

 very surprising to find that a Frog, whose Cerebrum and Cerebellum 

 have been destroyed, can still stand, and even leap. It is surpris- 

 ing, that is, if we look at it from the point of view of what would 

 happen to one of the higher animals under similar circumstances, 

 but much less so if we consider the degree and kind of locomotor 

 powers that would be possessed by many Insects similarly muti- 

 lated. 



