Send to

Choose Destination
Phys Rev Lett. 2006 Jul 28;97(4):048104. Epub 2006 Jul 28.

Gradient learning in spiking neural networks by dynamic perturbation of conductances.

Author information

Kavli Institute for Theoretical Physics, University of California, Santa Barbara, California 93106, USA.


We present a method of estimating the gradient of an objective function with respect to the synaptic weights of a spiking neural network. The method works by measuring the fluctuations in the objective function in response to dynamic perturbation of the membrane conductances of the neurons. It is compatible with recurrent networks of conductance-based model neurons with dynamic synapses. The method can be interpreted as a biologically plausible synaptic learning rule, if the dynamic perturbations are generated by a special class of "empiric" synapses driven by random spike trains from an external source.

[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for American Physical Society
Loading ...
Support Center