stdp_synapse_hom – Synapse type for spike-timing dependent plasticity using homogeneous parameters¶
Description¶
stdp_synapse_hom
is a connector to create synapses with spike time
dependent plasticity (as defined in [1]). Here the weight dependence
exponent can be set separately for potentiation and depression.
Parameters controlling plasticity are identical for all synapses of the model, reducing the memory required per synapse considerably.
Examples:
multiplicative STDP [2] mu_plus = mu_minus = 1.0
additive STDP [3] mu_plus = mu_minus = 0.0
Guetig STDP [1] mu_plus = mu_minus = [0.0,1.0]
van Rossum STDP [4] mu_plus = 0.0 mu_minus = 1.0
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 |
ms |
Time constant of STDP window, potentiation (tau_minus defined in postsynaptic neuron) |
lambda |
real |
Step size |
alpha |
real |
Asymmetry parameter (scales depressing increments as alpha*lambda) |
mu_plus |
real |
Weight dependence exponent, potentiation |
mu_minus |
real |
Weight dependence exponent, depression |
Wmax |
real |
Maximum allowed weight |
The parameters are common to all synapses of the model and must be set using SetDefaults on the synapse model.
Transmits¶
SpikeEvent