x Conte)its 



PAGE 

 Considerations on function. 



The representation of movement in the cerebral cortex . . . . . . . 217 



The doctrines of experimental physiology . . . ... .218 



Embryological data .... 218 



On certain association tracts of fibres . 219 



The clinical evidence ......... . 221 



Motor aphasia and the motor speech mechanism . ... 221 



Agraphia ..... . 225 



High and low evolutionary movements . 226 



Summnry ....... 227 



List of references ........... . 229 



CHAPTER X. 



THE FRONTAL AND PREFRONTAL AREAS. 



Introductory remarks . 231 



Histology. 



Type of arrangement of cortical nerve fibres . 231 



Type of cell lamination ...... 234 



Distribution 236 



The corresponding areas in the anthropoid brain 236 



A consideration of function . . . 238 

 Experimental data ....... 



Clinical observations .... 241 



Embryological evidence ....... 243 



Deductions from histology ..... 244 



Deductions from comparative anatomy . . ... 246 



Summary ......... 247 



List of references ...... 



CHAPTER XI. 



THE ISLAND OF REIL. 



Introduction and remarks on anatomy .......... 250 



Histology. 



Types of arrangement of cortical nerve fibres . 251 



Types of cell lamination ....... . . 253 



Distribution of types of cortical structure . . 255 



Condition in the manlike ape ....... . 256 



A consideration of function. 



Points in phylogeny ....... 256 



Clinical doctrines . . . . . 2o" 



The insula as a gustatory centre . . .... 259 



Summitry ........... .... 2. ill 



List of references ......... 260 



