1054 



CORTICAL MOTOR REGION IN MAN. [BOOK in. 



Par. 



L B 



FIG. 129. DIAGRAM OF THE GYRI (CONVOLUTIONS) SULCI, (FISSURES) ON THE 

 LATERAL SURFACE OF THE ElGHT HEMISPHERE OF MAN. 



TEMP 



FIG. 130. 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. 126, 127. 



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

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

 marginal = first temporal. Triangular lobule = cuneus. Central lobe = Island of 

 Reil. Paracentral lobule = the mesial face of the superior frontal, within the 

 marginal gyms. Cingulum = the part of the gyrus fornicatus which adjoins the 

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

 sometimes restricted to the front part of the hippocampal 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 Rolando. Perpendicular =parieto- 

 occipital. Parietal = intraparietal or sometimes interparietal. 



Temporo-sphenoidal lobe = temporal lobe. 



