Figure 1.

A maximum entropy model for population coupling. A, Spikes trains are recorded with a multielectrode array and binned in 20 ms time windows. We study the dependence between the binned response of each neuron ${\sigma }_i$ and the population rate K, defined as the summed activity of all neurons. B–D, The linear-coupling model fits the following three observables with high accuracy: the population rate distribution (B); the cells firing rates (C); and population couplings (D). For each observable, the model fit is plotted against empirical values.