Morris-Lecar Neuron
The Morris Lecar neuron model (also see this Scholarpedia article) is a 2-dimensional neuron model which models neural dynamics based on calcium and potassium conductances. A simplification of Hodgkin-Huxley dynamics without the sodium channels. Potassium and calcium can capture many of the core dynamics.
Part of a family of 2-variable neuron activation models.
As a family tree, Hodgkin-Huxley came first, then FitzHugh-Nagumo, then Morris-Lecar
Membrane potential is what shows as activation.
Parameter descriptions are given here though it may help to simply think of these as the parameters of a complex dynamical system. More detailed description of similar parameters are in the AdEx docs.
Membrane Properties
Capacitance (µF/cm²): Behaves like a time constant. Higher capacitance leads to slower changes in the cell.
Voltage const. 1: How does calcium respond to voltage.
Voltage const. 2: How does calcium respond to voltage.
Threshold (mV): voltages above this make the neuron spike.
Background current (nA): A constant level of current that can be set.
Add Noise: Whether to add noise to
Ion Properties
Ca2+ Conductance (µS): Calcium conductance. If higher, voltage pulled more quickly to Ca2+ equilibrium.
K+ Conductance (µS): Potassium conductance. If higher, voltage pulled more quickly to K+ equilibrium.
Leak Conductance (µS): Leak conductance. If higher, voltage pulled more quickly to Leak equilibrium.
Ca2+ Equilibrium (mV): Calcium equilibrium.
K+ Equilibrium (mV): Potassium equilibrium.
Leak Equilibrium (mV): Leak equilibrium.
K+ Consts.
K+ Const. 1: V3 on the Scholarpedia page, which roughly corresponds to how potassium current responds to membrane voltage.
K+ Const. 2: V4 on the Scholarpedia page.
K+φ: Potassium channel time constant/decay rate. If higher, potassium changes more slowly.
Noise
See here.