Fig. 1.

Equations used to simulate the Ex and Inh units. Variable names and units follow the conventions used in NEURON. The simulations consisted of separate modules for the cell somas (large circles) and synapses. The equations for the synapses are described in Materials and Methods. Parameters for PPF, PPD, and the slow IPSP were actually computed in the somatic compartment and then passed to the synaptic modules (because short-term plasticity of all the synapses of a given unit will have the same values). The arrows between both modules represent the passing of these pointer variables.