iaf_psc_exp_multisynapse – Leaky integrate-and-fire neuron model with multiple ports
====================================================================================

Description
+++++++++++

``iaf_psc_exp_multisynapse`` is a direct extension of iaf_psc_exp.
On the postsynaptic side, there can be arbitrarily many synaptic
time constants (``iaf_psc_exp`` has exactly two: ``tau_syn_ex`` and ``tau_syn_in``).

This can be reached by specifying separate receptor ports, each for
a different time constant. The port number has to match the respective
``receptor_type`` in the connectors.

.. note::


   If ``tau_m`` is very close to ``tau_syn_ex`` or ``tau_syn_in``, the model
   will numerically behave as if ``tau_m`` is equal to ``tau_syn_ex`` or
   ``tau_syn_in``, respectively, to avoid numerical instabilities.

   For implementation details see the
   `IAF_neurons_singularity <../model_details/IAF_neurons_singularity.ipynb>`_ notebook.

For conversion between postsynaptic potentials (PSPs) and PSCs,
please refer to the ``postsynaptic_potential_to_current`` function in
:doc:`PyNEST Microcircuit: Helper Functions <../auto_examples/Potjans_2014/helpers>`.

Sends
+++++

SpikeEvent

Receives
++++++++

SpikeEvent, CurrentEvent, DataLoggingRequest

See also
++++++++
:doc:`Neuron <index_neuron>`, :doc:`Integrate-And-Fire <index_integrate-and-fire>`