stdp_triplet_synapse – Synapse type with spike-timing dependent plasticity (triplets)

Description

stdp_triplet_synapse is a connection with spike time dependent plasticity accounting for spike triplet effects (as defined in [1]).

Notes:

• Presynaptic traces r_1 and r_2 of [1] are stored in the connection as Kplus and Kplus_triplet and decay with time-constants tau_plus and tau_plus_triplet, respectively.

• Postsynaptic traces o_1 and o_2 of [1] are acquired from the postsynaptic neuron states Kminus_ and triplet_Kminus_ which decay on time-constants tau_minus and tau_minus_triplet, respectively. These two time-constants can be set as properties of the postsynaptic neuron.

• This version implements the ‘all-to-all’ spike interaction of [1]. The ‘nearest-spike’ interaction of [1] can currently not be implemented without changing the postsynaptic archiving-node (clip the traces to a maximum of 1).

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

tau_plus	real	Time constant of short presynaptic trace (tau_plus of [1])
tau_plus_triplet	real	Time constant of long presynaptic trace (tau_x of [1])
Aplus	real	Weight of pair potentiation rule (A_plus_2 of [1])
Aplus_triplet	real	Weight of triplet potentiation rule (A_plus_3 of [1])
Aminus	real	Weight of pair depression rule (A_minus_2 of [1])
Aminus_triplet	real	Weight of triplet depression rule (A_minus_3 of [1])
Wmax	real	Maximum allowed weight

States
Kplus	real	Pre-synaptic trace (r_1 of [1])
Kplus_triplet	real	Triplet pre-synaptic trace (r_2 of [1])

Transmits

SpikeEvent

References

[1] (1,2,3,4,5,6,7,8,9,10,11,12,13)

Pfister JP, Gerstner W (2006). Triplets of spikes in a model of spike timing-dependent plasticity. The Journal of Neuroscience 26(38):9673-9682. DOI: https://doi.org/10.1523/JNEUROSCI.1425-06.2006

See also

stdp_triplet_synapse_hpc, stdp_synapse, static_synapse

Examples using this model

None