ANNarchy 5.0.0
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On this page

  • STP
    • Parameters

STP

STP(self, tau_rec=100.0, tau_facil=0.01, U=0.5)

Synapse exhibiting short-term facilitation and depression.

Implemented using the model of Tsodyks, Markram et al.:

Tsodyks, Uziel and Markram (2000) Synchrony Generation in Recurrent Networks with Frequency-Dependent Synapses. Journal of Neuroscience 20:RC50

Note that the time constant of the post-synaptic current is set in the neuron model, not here.

Equivalent code:

STP = ann.Synapse(
    parameters = dict(
        tau_rec = 100.0,
        tau_facil = 0.01,
        U = 0.5,
    ),
    equations = [
        ann.Variable('dx/dt = (1 - x)/tau_rec', init = 1.0, method='event-driven'),
        ann.Variable('du/dt = (U - u)/tau_facil', init = 0.5, method='event-driven'),
    ],
    pre_spike="""
        g_target += w * u * x
        x *= (1 - u)
        u += U * (1 - u)
    """
)

Parameters

Name Type Description Default
tau_rec depression time constant (ms). 100.0
tau_facil facilitation time constant (ms). 0.01
U use parameter. 0.5
IBCM
STDP
 

Copyright Julien Vitay, Helge Ülo Dinkelbach, Fred Hamker