CHAP, ii.] 



THE BRAIN. 



1055 



Fr.L 



Te.C 



FIG. 131. THE LATERAL SURFACE OF THE BIGHT CEREBRAL HEMISPHERE OF MAN 



IN OUTLINE, TO ILLUSTRATE THE CORTICAL AREAS. BeduCed from UatUie. 



The position of the areas of the cortex concerned with movements of the face, arm, 

 and leg, and with the senses of sight and hearing are approximately shewn. 



/The position of the area connected with speech (Broca's centre) is also shewn 

 for the sake of comparison of it with the position of the other areas ; the 

 representation of speech in the cortex cerebri lies however in the left hemisphere 

 chiefly. 



Oc. L. Occipital lobe ; Fr. L. Frontal lobe; Te.L. Temporal lobe; Sy. f. the fissure 

 of Sylvius ; C. /. the central fissure (Bolandic) ; Cm. /. indicates the position 

 of the posterior end of the calloso-marginal fissure. 



Fr.L 



Oc.L 



Te.L 



FIG. 132. THE MESIAL SURFACE OF THE BIGHT CEREBRAL HEMISPHERE OF MAN 

 IN OUTLINE, TO ILLUSTRATE THE CORTICAL AREAS. 



The areas shown are those connected with the movements of the leg, and with the 

 senses of sight and smell. 



Fr. L. the frontal pole of the hemisphere ; Oc. L. the occipital pole, Te. L. the 

 temporal pole. Cm. f. the calloso-marginal fissure separating the marginal 

 gyrus above from the gyrus fornicatus below. Cf. marks the situation of 

 the central fissure, the fissure itself not being apparent on the mesial aspect 

 of the hemisphere. The corpus callosurn and the anterior commissure are 

 seen in cross section. 



F. 



67 



