.. currentmodule:: brian

.. index::
   pair: example usage; Current
   pair: example usage; MembraneEquation
   pair: example usage; NeuronGroup
   pair: example usage; run
   pair: example usage; StateMonitor

.. _example-misc_HodgkinHuxley:

Example: HodgkinHuxley (misc)
=============================

Hodgkin-Huxley model
Assuming area 1*cm**2

::

    
    from brian import *
    from brian.library.ionic_currents import *
    
    #defaultclock.dt=.01*ms # more precise
    El = 10.6 * mV
    EK = -12 * mV
    ENa = 120 * mV
    eqs = MembraneEquation(1 * uF) + leak_current(.3 * msiemens, El)
    eqs += K_current_HH(36 * msiemens, EK) + Na_current_HH(120 * msiemens, ENa)
    eqs += Current('I:amp')
    
    neuron = NeuronGroup(1, eqs, implicit=True, freeze=True)
    
    trace = StateMonitor(neuron, 'vm', record=True)
    
    run(100 * ms)
    neuron.I = 10 * uA
    run(100 * ms)
    plot(trace.times / ms, trace[0] / mV)
    show()