CHAP, ii.] 



THE BRAIN. 



PRO N_J A L 



767 



Par.-Oc. 



I O B 



FIG. 134. DIAGRAM OF THE GYRI (CONVOLUTIONS) SULCI, (FISSURES ON THB 

 LATERAL SURFACE OF THE lilUHT HEMISPHERE OF MAN. 



BE. 



/: Rclando 



TEMP 

 FIG. 135. THE SAME ON THE MESIAL SURFACE. (Gowers.) 



In both figures the sulci are indicated by italic and the convolutions by 

 roman type. 



The following list of some synonyms may perhaps be of use in connection 

 with these figures and those of the brain of the monkey, Figs. 1 _':', P.M. 



Gyri, or Convolutions. Precentral or anterior central = ascending frontal. 

 Postcentral or posterior central = amending parietal. Superior temporal = infra- 

 marginal = first temporal. Triangular lobule = cunens. Central lobe =: Island 

 of Ixeil. Paracentral lobule = the mesial face of the ascending frontal, within 

 the marginal gyrus. Ciiigulmn = the part of the gyrus foniieutus which adjoins 

 the Corpus callosum. Gyrus Hippocampi = uncinate gyrus, though the latter 

 name is sometimes restricted to the front part of the hippoeampal gyrus ; the two 

 may be considered as a continuation of the gyrus fornicatus. and the three 

 together, forming a series, have been called -the great limbic lobe.' 



Sulci or Fissures. Central = Rolandic, or of Kolando. Perpendicular = 

 parieto-occipital. Parietal = intraparietal or sometimes interparietal. 



Temporo-spheuoidal lobe = temporal lobe. 



