LOCALISATION OF FUNCTION. 



267 



leg, and it is therefore argued that there must be con- 

 nections between these widely separated areas. It 

 would appear that this connection depends upon path- 

 ways of association furnished by central cells, and along 

 which the disturbance set up in the auditory area is 

 communicated to the leg area. The relation here cited 

 is but one of many combinations which can occur, and 

 \ve have to conceive the incoming disturbances as dis- 

 tributing itself in many directions, although the response 



FIG. 58. Lateral view of a human hemisphere, showing the 

 bundles of association fibres. (Starr.) A, A, between adja- 

 cent gyri ; B, between frontal and occipital areas ; C, between 

 frontal and temporal areas, cingulum ; D, between frontal and 

 temporal areas, fasciculus uncinatus ; E, between occipital and 

 temporal areas, fasciculus longitudinalis inferior; C.N., cau- 

 date nucleus ; O.T., optic thalamus. 



to it may be limited. Some of the larger pathways 

 which probably furnish such connection are shown in 

 Fig. 58. 



In the cortex, therefore, as in the case of the spinal 

 cord, a sensory impulse arriving at one of these given 

 points, may diffuse itself in many directions, and indeed 



