[Reflection of the plastic properties of monosynaptically interconnected neurons in the statistical characteristics of their spike activity].

By mathematical and biomathematical methods of neuronal interaction modelling, changes were studied of cross-correlation histograms (CCH) of impulse flows and of average interimpulse intervals of monosynaptically interconnected neurones, at changes of efficiency of forward and backward connections, of excitability of neurones and of summate action on them of independent random afferent synaptic inflows. It is shown, that a single sign of efficiency increase of monosynaptic excitatory or inhibitory connection between neurones (amplitude increase of the corresponding postsynaptic potential) consists in amplitude increase of the main peak or trough the rated CCH of their impulse flows, followed by a decrease of average interspike intervals of both neurones.