Schematic representation of the network organization and raw data. (A) Sample scheme of neuron placement onto a MEA. Red and blue squares indicate the position of C1 and B2 cells, respectively. The number inside the squares indicate the electrode position in the MEA layout. (B) 1 second of activity from a microelectrode with a C1 neuron. (C) 1 second of activity coming from a microelectrode with a B2 neuron.