gap_junction – Synapse type for gap-junction connections
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Description
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``gap_junction`` is a connector to create gap junctions between pairs of
neurons. Gap junctions are bidirectional connections.  In order to
create one accurate gap-junction connection between neurons i and j
two NEST connections are required: For each created connection a
second connection with the exact same parameters in the opposite
direction is required. NEST provides the possibility to create both
connections with a single call to Connect via the make_symmetric flag.

The value of the parameter ``delay`` is ignored for connections of
type ``gap_junction``.

See also [1]_, [2]_.

Sends
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GapJunctionEvent

References
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.. [1] Hahne J, Helias M, Kunkel S, Igarashi J, Bolten M, Frommer A, Diesmann,
       M (2015). A unified framework for spiking and gap-junction interactions
       in distributed neuronal network simulations. Frontiers in
       Neuroinformatics 9:22. DOI: https://doi.org/10.3389/fninf.2015.00022

.. [2] Mancilla JG, Lewis,TJ, Pinto DJ, Rinzel J, Connors BW (2007).
       Synchronization of electrically coupled pairs of inhibitory
       interneurons in neocortex. Journal of Neuroscience 27:2058-2073.
       DOI: https://doi.org/10.1523/JNEUROSCI.2715-06.2007

See also
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:doc:`Synapse <index_synapse>`, :doc:`Gap Junction <index_gap junction>`