Figure 14.

Examples of how STDP selectively strengthens connections with particular delays between pairs of pre- and postsynaptic neurons with multiple synaptic contacts. Eguchi et al. [9] showed results for a model in which each pair of pre- and postsynaptic neurons had two connections with different randomly assigned transmission delays in the interval [0, 10] ms. The figure shows how the strengths of the two synaptic connections with different delays between four example pairs of pre- and postsynaptic neurons are modified by STDP during visual training. It can be seen that, in each of the four cases, one connection is selectively strengthened, while the other is weakened. In this way, STDP is able to effectively choose which transmission delay to strengthen in the connectivity between the two neurons in order to promote the emergence of polychronization within the network. Reproduced with permission from Eguchi et al. [9].