[Elementary neuronal ensembles as the basis for the functional organization of the brain].

The structural basis of neuronal assemblies is made up of morphological associations of neurones determined by the properties of the central projection of afferent pathways. Underlying the functional organization of probabilistic neuronal assemblies is the formation of conjugated relations between neurones of the central zone of synergically activated units and the surrounding zone of inhibited neurones. The characteristics of informational activity and neuronal assemblies are related to the optimization of perception processes and reorganization of sensory information, and to the selection of useful information from the general sensory flow, especially in the course of formation of a habit. The observed characteristics of the work of probabilistic neuronal assemblies are considered as manifestations of formation of structural, functional and informational redundancy, the basic mechanism ensuring reliable functioning of the informational-controlling brain systems.