Activity Patterns in Cortical Minicolumns
The activation of cortical minicolumns has been investigated in a model in which the neurons lying in a given cortical layer are regarded as a collective unit. The behaviour of such a neuronal group is found to depend on the interplay between the excitatory and inhibitory cellular sub-populations. Likewise, the interactions between two assemblies, lying in different cortical layers in a given minicolumn, depend upon the nature of the connections between them. There is evidence of a control mechanism that stems from the balancing influences of excitation and inhibition. Because the interlayer connections are not symmetric, different layers are found to exhibit different types of behaviour, in accordance with physiological observations.
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