Fig. 4.

Cortical activity includes reliable pairwise timing relationships. A: cumulative distribution of inferred connection strengths for connected model (black) vs. Poisson rate-matched (gray) populations. Firing rates for each Poisson unit were matched on a trial-by-trial basis to each model neuron. Inset, the corresponding probability distribution function, in zoom. Top percentile of nonzero functional weights (broken line). B: comparison with imaging data. Inferred functional weights for activity recorded in mouse somatosensory neocortex.