Transient inhibitory postsynaptic currents (IPSCs) generated by synapses distributed according to Renshaw, proximal, distal, and uniform synapse distribution with membrane potential clamped at −55 mV and tonically activated excitatory synapses for motoneuron models LAD5-4 (left), LVN2-1 (center), and LVN4-1 (right). Rm was set to a value of 5,000 Ω·cm2. Currents are injected by a somatic voltage clamp; therefore downward currents are depolarizing and upward currents are hyperpolarizing. A: IPSCs in motoneurons with no L-type Ca2+ channels. The current reaching the soma in the absence of any inhibition is denoted to the left of each trace. B: IPSCs from A normalized to the peak of the largest IPSC in each model. C: IPSCs in motoneurons with L-type Ca2+ channels included in the models. The current reaching the soma in the absence of any inhibition is denoted to the left of each trace. D: IPSCs from C normalized to the peak of the largest IPSC in each motoneuron.