682 



THE CEREBRUM 



the lesion also involves the posterior Rolandic region. Hence, an 

 injury, involving the entire centro-parietal field, must always be ac- 

 companied by a loss of cutaneous sensation. 



Monakow does not give a definite boundary for this sensory region, 

 but merely states that it embraces the posterior central gyrus and the 



FIG. 344. HUMAN BRAIN SHOWING OUTER (A) AND MESIAL (B) SURFACES, AND THE 



SITUATION OP THE CHIEF MOTOR AND SENSORT AREAS. 



The different shading represents the extent of each of these areas as determined by a 

 study of the histological structure of the cortex. (Campbell.) 



anterior realm of the superior to inferior convolutions of the parietal 



lobe. Flechsig's view 1 coincides with this localization. He especially 



emphasizes the fact that the sensory points are centralized in the con- 



1 Sachs. Gesellsch. der Wissenschaften, Leipzig, 1904. 



