A section of axon defined by its length, diameter, membrane capacitance and cytoplasmic resisitvity.
Optionally, the axon may be myelinated, in which case the length of the nodes (unmyelinated sections which can contain ion channels), and the interval between them should be specified along with the effective capacitance of the myelinated membrane. Typically, the myelin sheath consists in a pair of lipid bylayers wrapped a hundred or so times around the cell, giving the effect of 200 membrane capacitors in series and hence a capacitance 200 times smaller than for a single bilayer. Realistically, the capacitance of a single bilayer is very close to 1.0 microF per square centimeter although this can be changed at will in the calculation.
The initial potential of the axon is set by V_init. This is not strictly part of the model, but is included for convenience in setting up the initial conditions of a calculation.
The solution filling the axxon is set in the solution field and should be and instance of the Solution component. Finally, the active electrical properties of the axon are given by the ion channels it contains as defined through a ChannelSet object. This specifies the membrane surface density of each type of axon. In an unmyelinated axon these are assued to be uniformly distributed along the axon. In a myelinated one, this density is applied only at the nodes.