How do I simulate a neuron firing?

Open this page and use the live Cardiac Rhythm tool below — set your inputs and the simulation runs instantly in your browser using real numerics. No install, no account needed.

Yes. The simulation runs free in your browser. A one-time unlock or a Pro plan adds advanced parameters, saved presets, data import, and clean exports.

Can I use my own numbers?

Absolutely — every input is adjustable, and with data import you can drive a neuron firing from your own measurements.

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Cardiac Rhythm for a neuron firing

Simulate a neuron firing live in your browser. This runs the real Cardiac Rhythm solver — adjust the inputs, watch it respond instantly, and export the result. No install, no account.

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Neuron

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Hodgkin-Huxley NeuronLive

the action potential

Controls

Speed1×

Presets

Injected current (µA/cm²)

The Hodgkin-Huxley model — the Nobel-winning description of the nerve impulse — tracks voltage and the opening of sodium and potassium channels. Below a threshold current the neuron is silent; above it, it fires a train of action potentials whose rate climbs with the stimulus.

▶ Run in Python

Data Inspector

Firing rate0.0 Hz

Regimespiking

ChannelsNa⁺ / K⁺

Governing equation

C_{m} \frac{d V}{d t} = 10 - \overset{g}{ˉ}_{N a} m^{3} h (V - E_{N a}) - \overset{g}{ˉ}_{K} n^{4} (V - E_{K}) - \overset{g}{ˉ}_{L} (V - E_{L})

Reading this result: Above threshold: each stimulus recharges the membrane fast enough to re-trigger Na⁺ channels, so the neuron fires a repetitive train whose rate rises with the current.

Runs locally in your browser — free forever. Scale to the cloud when reality gets heavy.

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About this simulation

The full Cardiac Rhythm tool models a neuron firing with the same numerics engineers and scientists use — running entirely client-side. Change any parameter and the result updates in real time, so you can build intuition, check a design, or teach the concept without spreadsheets or installs.

More you can do with Cardiac Rhythm

Cardiac Rhythm for a bacterial growth Cardiac Rhythm for a predator-prey cycle Cardiac Rhythm for a heartbeat Cardiac Rhythm for a virus spread Cardiac Rhythm for a gene expression Cardiac Rhythm for a protein fold Cardiac Rhythm for a muscle contraction Cardiac Rhythm for a blood flow

Other ways to simulate a neuron firing

Dynamical Systems for a neuron firing Epidemic Network for a neuron firing Spatial Predator–Prey for a neuron firing SIR Epidemic for a neuron firing Hodgkin-Huxley Neuron for a neuron firing Lotka-Volterra for a neuron firing

Frequently asked questions

How do I simulate a neuron firing?: Open this page and use the live Cardiac Rhythm tool below — set your inputs and the simulation runs instantly in your browser using real numerics. No install, no account needed.
Is it free?: Yes. The simulation runs free in your browser. A one-time unlock or a Pro plan adds advanced parameters, saved presets, data import, and clean exports.
Can I use my own numbers?: Absolutely — every input is adjustable, and with data import you can drive a neuron firing from your own measurements.