614 



NERVOUS SYSTEM. 



It remains now to locate the distinct motor areas. This has been done 

 on the brain of the monkey, by Ferrier, who has applied his observations as 



FIG. 227. Paracentral lobule, on the inner surface of the cerebrum (Exner). 

 The shaded area in the diagram is the paracentral lobule. 



nearly as possible to the human brain. While the divisions made by Ferrier 

 can not be taken as absolute, experiments on monkeys have been followed by 



FIG. 228. Lateral view of the human brain, icith certain motor cortical areas (modified from Ferrier). 



