I3I2 



HANDBOOK OF PHYSIOLOGY -^ NEUROPHVSIOLOGV II 



FIG. 4. Diagram of site of electrical stimulation at stereotaxic frontal plane 12 which produced 

 good recruiting responses in the visual cortex as shown in fig. 5. The lesion produced by coagulation 

 and intended to destroy the lateral geniculate body completely is outlined in the diagrams of frontal 

 planes 9, 7 and 5. [From Hanbery & Jasper (31).] 



limbs ol" the intralaminar .system and the dorsolateral 

 portion of n. ventralis anterior and reticularis. The 

 dorsolateral portions show preferential conduction to 

 more posterior areas of the cortex, while the medio- 



ventral portions show a doniinant projection to fron- 

 tal and mesial cortical areas. Using threshold local 

 stimulation, a definite topographic organization can 

 be shown, although it is a rather labile one, witli con- 



