Warning

This is A PREVIEW for NEST 3.0 and NOT an OFFICIAL RELEASE! Some functionality may not be available and information may be incomplete!

stdp_triplet_connection – 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).

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