The Hodgkin Huxley Model

• This model accounts for a neural spike.
• What they figured out was a model that included leak channels, and voltage gated ion channels.
• When the neuron is in its typical state, and leak channels are open, and it has roughly stable sodium and potassium levels.
• That means its voltage is roughly stable.
• If, however, the neuron's voltage increases (by an elctrode input or from other neurons), the voltage
dependent sodium channel (or gate) opens.
• This causes an influx of sodium, which causes the voltage to rapidly increase.
• Then the sodium channel closes.
• A voltage dependent potassium channel also opens up, and the potassium flows out of the neuron.
• This causes the neuron's voltage to decrease.
• It hyperpolarises and goes below the resting potential causing the potassium channel to close.