hh_psc_alpha – Hodgkin-Huxley neuron model
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Description
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``hh_psc_alpha`` is an implementation of a spiking neuron using the Hodgkin-Huxley
formalism.
1. Postsynaptic currents
Incoming spike events induce a postsynaptic change of current modelled
by an alpha function. The alpha function is normalized such that an event of
weight 1.0 results in a peak current of 1 pA.
2. Spike Detection
Spike detection is done by a combined threshold-and-local-maximum search: if
there is a local maximum above a certain threshold of the membrane potential,
it is considered a spike.
See also [1]_, [2]_, [3]_.
For details on asynchronicity in spike and firing events with Hodgkin Huxley models
see :ref:`here `.
Parameters
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The following parameters can be set in the status dictionary.
======== ====== ============================================================
V_m mV Membrane potential
E_L mV Leak reversal potential
C_m pF Capacity of the membrane
t_ref ms Duration of refractory period
g_L nS Leak conductance
tau_ex ms Rise time of the excitatory synaptic alpha function
tau_in ms Rise time of the inhibitory synaptic alpha function
E_Na mV Sodium reversal potential
g_Na nS Sodium peak conductance
E_K mV Potassium reversal potential
g_K nS Potassium peak conductance
Act_m real Activation variable m
Inact_h real Inactivation variable h
Act_n real Activation variable n
I_e pA External input current
======== ====== ============================================================
Problems/Todo
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- better spike detection
- initial wavelet/spike at simulation onset
References
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.. [1] Gerstner W, Kistler W (2002). Spiking neuron models: Single neurons,
populations, plasticity. New York: Cambridge University Press
.. [2] Dayan P, Abbott LF (2001). Theoretical neuroscience: Computational and
mathematical modeling of neural systems. Cambridge, MA: MIT Press.
https://pure.mpg.de/pubman/faces/ViewItemOverviewPage.jsp?itemId=item_3006127>
.. [3] Hodgkin AL and Huxley A F (1952). A quantitative description of
membrane current and its application to conduction and excitation in
nerve. The Journal of Physiology 117.
DOI: https://doi.org/10.1113/jphysiol.1952.sp004764
Sends
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SpikeEvent
Receives
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SpikeEvent, CurrentEvent, DataLoggingRequest
See also
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:doc:`Neuron `, :doc:`Hodgkin-Huxley `, :doc:`Current-Based `
Examples using this model
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.. listexamples:: hh_psc_alpha