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Conventions
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Units
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Unless specified every quantities are expressed in the following units:

* Length: μm
* Time: ms
* Voltage: mV
* Current: pA
* Concentration: mM (mmol/L)
* Diffusion coefficient: μm^2/ms
* Capacitance: μF/cm^2
* Longitudinal resistance: Ohm.cm
* Channel membrane conductance: mS/cm^2