Network activity in simulation and experiments.

<p><b>A</b> Bright field image (left panel) of a region of a neuronal culture at day <i>in vitro</i> 12, together with its corresponding fluorescence image (right panel), integrated over 200 frames. Round objects are cell bodies of neurons. <b>B</b> Examples of real (left) and simulated (right) calcium fluorescence time series, vertically shifted for clarity. <b>C</b> Corresponding averages over the whole population of neurons. <b>D</b> Distribution of population-averaged fluorescence amplitude for the complete time series, from a real network (left) and a simulated one (right).