Movie S2.

Movie showing the associated synaptic activity (uE and uI) when γ = 1/8 and input (b) is increased and then decreased again. The black dot denotes the trajectory observed in our simulated LFP shown in Fig. 6, Lower. The blue (excitatory) and red (inhibitory) lines correspond to the “nullclines” or the first and second derivatives when the synaptic activities of the excitatory and inhibitory populations are both zero. Intersections of the two curves are, therefore, equilibria of the system.