Fig. 1

Cross-correlations in the Gaussian variables lead to correlations of coincident level crossings. a Spike correlations can arise from common input in a neuronal network. b We consider coincident level crossings arising from two Gaussian processes that share a common latent source. Whenever the voltage crosses a threshold ψ from below a spike is emitted. Spikes are indicated by vertical solid lines. The vertical dotted lines indicate the width of a time bin T used to compute spike counts $U_{[0,T]}^{V_i}(\psi )$, $i=1,2$