In postsynaptic buccal cells, B34 and B40 produce chloride-mediated rapid inhibitory postsynaptic potentials
(IPSPs) that are desensitized by GABA and the [GABA.sub.A] agonist muscimol, blocked by the [GABA.sub.A] antagonists picrotoxin and bicuculline, and augmented by the GABA uptake inhibitor nipecotic acid (Jing et al., 2003).
with [E.sub.i] = [E.sub.i](t), t [greater than or equal to] 0 and [I.sub.j] = [I.sub.j](t), t [greater than or equal to] 0 as Poisson processes with rates [[lambda].sub.E,i](t) and [[lambda].sub.I,j](t), a > 0 and b > 0 being the magnitude of each excitatory postsynaptic potential (EPSP) and inhibitory postsynaptic potential
(IPSP); a cell receives excitatory postsynaptic potentials (EPSPs) at p synapses and inhibitory postsynaptic potentials
(IPSPs) at q inhibitory synapses.