Hodgkin-Huxley Neuron Simulator

Computational model of squid axon — membrane potential and ionic currents from the 1952 equations

Ion Concentrations & Nernst

[Na⁺]_out (mM) +70 mV

[Na⁺]_in (mM)

[K⁺]_out (mM) -90 mV

[K⁺]_in (mM)

g_Na mS/cm²

g_K mS/cm²

g_L mS/cm²

C_m µF/cm²

I_inj µA/cm²

Onset (ms)

Duration (ms)

Type

Passive: subthreshold current → small depolarization that decays. Active: suprathreshold → all-or-none action potential.

Window (ms)

Speed

Time step: 0.01 ms (RK4). Pause to scroll through full trace.