Auryn simulator

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====== STPConnection ======

This [[Connection]] class implements the Tsodyks Markram synapse model [1] for short-term plasticity. See [[examples:sim_epsp_stp]] for an example.



===== Usage =====

<code cpp>
STPConnection * con = new STPConnection(poisson,neuron,w,1.0,GLUT);
</code>

is the standard usage to set up a connection object between the presynaptic [[SpikingGroup]] ''poisson'' and the postsynaptic [[NeuronGroup]] ''neuron''. In the example the connection assumes random sparse connectivity with weight ''w'' and the ''sparseness=1.0'' which targets glutamate receptors (cf. [[TransmitterType]]).

Setting up the model parameters is illustrated in the following example where we assume a synapse with ''U=0.2'', ''tau_d=200ms'' and ''tau_f=50ms'' (for details on the meanings of the different time parameters see [2]). Note, however, that the ''U'' parameter is split in this implementation so that one can combine a different spike-triggered jump with a different resting value of the ''u'' variable in the model.

<code cpp>
// Sets STP parameters (depression dominated)
double U = 0.2;
double taud = 200e-3; // s
double tauf = 50e-3;  // s

// Passes the parameters to the connection instance
con->set_tau_d(taud);
con->set_tau_f(tauf);
con->set_ujump(U);
con->set_urest(U);
</code>


===== Bibliography =====


[1] Markram, H., Wang, Y., Tsodyks, M., 1998. Differential signaling via the same axon of neocortical pyramidal neurons. Proc Natl Acad Sci U S A 95, 5323–5328.

[2] Mongillo, G., Barak, O., Tsodyks, M., 2008. Synaptic Theory of Working Memory. Science 319, 1543–1546. doi:10.1126/science.1150769



===== See also =====

Notes on [[parallelizing short-term plasticity]]