246 



HUMAN PHYSIOLOGY 



We do not exclude the possibility that some of the indefinite 

 organ sensations are perceived in centres situated lower down in 

 the brain. 



(2) The auditory centre lies in the median and the pos- 

 terior part of the upper temporal convolution, and in the 



Tactile area. 



Parietal lobe 

 association-centre.. 



Association centre of 

 the occipito-temporal lobe. 



Olfactory area. 



Association centre of 

 the occipito-temporal lobe. 



FIG. 24. 

 SENSORY AREAS OF THE CEREBRAL CORTEX. 



The sensory areas are dotted. In Fig. 23 the temporal lobe is slightly drawn 

 downward in order to show the auditory centre. The island of Reil is seen at 

 the shaded portion. 



transverse convolutions of the temporal lobes. The cen- 

 tripetal corona radiata fibres of the auditory centre are the 



