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Figure 6: Autocorrelation functions for the telegraph signals corresponding to a spontaneous activity of a hippocampal (CA3) singular neuron (solid curve) and to the spike train generated by the Rössler attractor fluctuations overcoming a threshold (circles). In order to make the autocorrelation functions comparable a rescaling has been made for the Rössler autocorrelation function. The data has been taken from [10].