322 NEUROLOGY, OR ANATOMY OF NERVOUS SYSTEM 



The lobes are the frontal, the parietal, the occipital, the temporal 

 and the central lobe, or island of Reil. 



FIG. 54 



INTERCEREBRAL F. 



FISSURE 

 . = GYRE 



Fissures and gyres of the basal surface of the cerebrum. (Gray.) 



The frontal lobe, the lateral surface, is separated behind, 

 from the parietal lobe, by the central fissure or the fissure 

 of Rolando, and below, from the temporal lobe by the Sylvian 



