CORTICAL CELL LAMINATION OF PAPIO HAMADRYAS. 613 



Cortical Cell Lamination of the Hemispheres of 

 Papio Hamadryas. 



By 



E. H. J. <iicliu«»tei% ]?I.A., 1>.§C., 



Fellow of New Colley;e, Oxford. 



With Plates 24-30. 



Preface. 



-^ The localisation of fuDction in the cerebral cortex is a 

 problem on the importance of which it is hardly uecessary 

 to dwell. Its practical value to the surgeon and its theoretical 

 interest to the physiologist and p.sychologist are obvious and 

 have been sufficiently recognised. It is a problem which 

 concerns many of the biological sciences, since it can be 

 approached in many different ways. The physiologist has, 

 by the electric stimulation of different parts of the surface of 

 the brain in various animals, obtained responses from different 

 parts of the body, and has thus been enabled to say what areas 

 control the movements of the various groups of muscles. 

 Occasional opportunities are afforded to the surgeon for 

 making similar experiments on the human subject. The 

 ablation of different parts of the cerebral cortex in the living 

 animal is another physiological method from which valuable 

 conclusions have been drawn. Observations on the altei-ations 

 in function associated with local cortical lesions due to 

 accident or to disease form a parallel method of research 

 in the domains of pathology. 



The contribution called lor from the anatomist and histo- 



VOL. 56, PART 4. NEW SERIES. 43 



