Abstract
Although spike-timing-dependent plasticity (STDP) is well characterized when pre- and postsynaptic spikes are paired with a given time lag, how this generalizes for more complex spike-trains is unclear. Recent experiments demonstrate that contributions to synaptic plasticity from different spike pairs within a spike train do not add linearly. In the visual cortex conditioning with spike triplets shows that the effect of the first spike pair dominates over the second. Using a previously proposed calcium-dependent plasticity model, we show that short-term synaptic dynamics and interaction between successive back-propagating action potentials (BPAP) may jointly account for the nonlinearities observed. Paired-pulse depression and attenuation of BPAPs are incorporated into the model through the use-dependent depletion of pre- and postsynaptic resources, respectively. Simulations suggest that these processes may play critical roles in determining how STDP operates in the context of natural spike-trains.
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Shah, N.T., Yeung, L.C., Cooper, L.N. et al. A Biophysical Basis for the Inter-spike Interaction of Spike-timing-dependent Plasticity. Biol Cybern 95, 113–121 (2006). https://doi.org/10.1007/s00422-006-0071-y
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DOI: https://doi.org/10.1007/s00422-006-0071-y