Spike-Timing-Dependent Plasticity and Short-Term Plasticity Jointly Control the Excitation of Hebbian Plasticity without Weight Constraints in Neural Networks

Figure 7

Distribution of the medians of synaptic weights at each synapse at Poisson inputs. The figure shows the variation of the median of the weight distribution at each Poisson input; is the mean Poisson firing rate. The median in the above figures was determined after synaptic connections have established the effect of external inputs and network stabilized. This stabilization happened after 170 bins; see Figure 5. Medians of postsynaptic neuron show the variations of the medians of the weight distributions of synaptic connection from presynaptic neuron A to postsynaptic neuron B. Similarly, show the variations of the median of the weight distributions of synaptic connections from presynaptic neuron B to the postsynaptic neuron A.