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urbanczik_synapse – Synapse type for a plastic synapse after Urbanczik and Senn

Description

urbanczik_synapse is a connector to create Urbanczik synapses as defined in 1 that can connect suitable multicompartment models. In contrast to most STDP models, the synaptic weight depends on the postsynaptic dendritic potential, in addition to the pre- and postsynaptic spike timing.

Urbanczik synapses require the archiving of the dendritic membrane potential which is continuous in time. Therefore they can only be connected to neuron models that are capable of doing this archiving. So far, the only compatible model is pp_cond_exp_mc_urbanczik.

Warning

This synaptic plasticity rule does not take precise spike timing into account. When calculating the weight update, the precise spike time part of the timestamp is ignored.

Parameters

eta	real	Learning rate
tau_Delta	real	Time constant of low pass filtering of the weight change
Wmax	real	Maximum allowed weight
Wmin	real	Minimum allowed weight

All other parameters are stored in the neuron models that are compatible with the Urbanczik synapse.

Remarks:

So far the implementation of the urbanczik_synapse only supports two-compartment neurons.

Transmits

SpikeEvent

References

1

Urbanczik R. and Senn W (2014). Learning by the dendritic prediction of somatic spiking. Neuron, 81:521 - 528. https://doi.org/10.1016/j.neuron.2013.11.030

See also

Synapse, Spike-Timing-Dependent Plasticity