914 



MAN 



prominence of tlie i^recential convolution nor ol the intermediate precentral 

 area of skilled mo\ements. The inferior frontal con\()lution, however, is a 

 conspicuous feature of the frontal lobe. It shows a considerable degree of 



FIG. 407. FUNCTIONAL LOCALIZATION OF THE BRAIN OUTLINED UPON THE 

 LEFT HEMISPHERE OI HOMO RHODESIENSIS. 



A, Auditory Area; r. Higher Faculties; FR, Fissure of Rolando; is, Fissure of Sylvius; o, Area of Skilled 

 -Movements; P, Sensory Area; s, Speech Area; v. Visual Area; x, Area of Voluntary .Motor Control. 



specialization on the left side in which the hori/ontal ramus ol theS\Kian 

 fissure may be discerned. The de\-elopnu'nt of this con\-olution on the right 

 side is almost as much acNanced. The basal surface of the frontal lobe con- 

 firms the impression that this is a |)rimiti\c' t\pe of cerebral organization. 

 The orbital concavities htiw a simian depth and the interorbital keels are 

 correspondingly pronounced. The imprint of the orbital com olutions is 



