The mechanism of diffusion and concentration of neural activity is one of the basic laws of neuronal interaction in the cerebral cortex.The evidence shows that the lateral connections between neurons in the cerebral neocortex take the following structure: the short-range lateral connections are excitatory while the long-range ones are inhibitory.This note shows that the structure of connections is able both to diffuse and to concentrate information; that is, the short-range excitatory connections provide The mechanism of diffusion and concentration of neural activity is one of the basic laws of neuronal interaction in the cerebral cortex. The evidence shows that the lateral connections between neurons in the cerebral neocortex take the following structure: the short-range lateral connections are excitatory while the long-range ones are inhibitory.This note shows that the structure of connections both able to diffuse and to concentrate information; that is, the short-range excitatory connections provide