124 



HUMAN PHYSIOLOGY. 



in the occipital lobe are found the parieto occipital and the calcarine 

 fissures. 



Convolutions. Frontal lobe. 



The Ascending frontal convolution^ situated in front of the fissure of 

 Rolando, runs downward and forward ; it is continuous above with the 

 anterior frontal, and below with the inferior frontal convolution. 



FIG. 13. 



LEFT SIDE OF THE HUMAN BRAIN (DIAGRAMMATIC). 



F, frontal ; P, parietal; O, occipital ; T, temporo-sphenoidal lobe ; S, fis ure of Sylvius 

 S', horizontal; S", ascending ramus of S ; c, sulcus centralis, or fissi re of Rolando 

 A, ascending frontal, and B, ascending parietal, convolution; F 1( supe ior, F 2 , m ddle 

 and FS, inferior, frontal convolutions; fj, superior, and f 2 , inferior, f ontal fiss ires 

 f 3 , sulcus praecentralis ; P, superior parietal lobule ; P 2 , inferior parietal lobule con 



, 



sisting of P 2 , supra-marginal gyrus, and P' 2 , angular gyrus ; ip, sulcus interparie 

 cm, termination of calloso-marginal fissure; Oi, first, Og, second, 03, third, occ 



alis ; 

 pital 



, , , , , , , 



convolutions ; p o, parieto-occipital fissure ; <?, transverse occipital fissure ; # 2 , inferior 

 longitudinal occipital fissure : T 1} first, T 2 , second. T 3 , temporo-spbenoidal, convolu- 

 tions , t\, first, z? 2 > second, temporo-sphenoidal fissues. {Landois' Physiology.} 



