[Cross-correlation as a method for discriminating impulses on multineuronal recordings].

Impulses series, singled out from multineuronal activity by means of amplitude discriminator, were analyzed by creating crosscorrelation histograms. The authors consider that in studying of net brain activity with crosscorrelation method of analysis "window" discrimination of impulses series in multineuronal record is a quite correct method and may be used along with discrimination of spikes by form. It is shown that the size of the "window", used for singling out of separate impulses series, is not a determining parameter in search of temporal dependence in the activity of the investigated cells, as final discrimination of the impulses of dependently acting neuronal pairs occurs at the level of the crosscorrelation method itself. The step of the analysis under the use of crosscorrelation method is of decisive significance for revealing of direct interconnections between neurones in the cases when these connections are masked on histograms with wide peaks reflecting the influences of common sources, on the recorded cells.