Membrane resistance and conductance can vary between compartments. Compartments can be split or fused manually or automatically to keep their electrotonic length within user defined bounds. Sets of ionic currents, transmitter release, synaptic current and concentration pool parameters are constructed in separate, named subdefinitions. For each compartment the user can select some of these subdefinitions with popup menus or none for a passive membrane compartment. Transmitter release can be constant, voltage dependent or concentration pool dependent.
Conductances can be calcium-dependent.