Ionic conductances for AWC^ON and RMD neurons.

We use VK = −80 mV, VCa = 60 mV and VNa = 30 mV as the reversal potentials for potassium, calcium and sodium currents, respectively. In AWCON the reversal potential for leakage current (Eq C10 in S1 File) is VL = −90 mV; in RMD it is VL = −80 mV.