Modeling Maintenance of Long-Term Potentiation in Clustered Synapses: Long-Term Memory without Bistability

Figure 4

Distributions of the magnitude of synaptic weight change. (a) Black trace, histogram with 80 bins illustrating the steady-state distribution of weight update amplitudes for the active synapses in Figure 2(a). These amplitudes consist of all the synchronous weight updates for the 9,482 active synapses (out of 10,000 total), at a given time step. Red curve, a normal distribution (mean 0.0, standard deviation 0.07) that approximates the histogram excepting the sharp peak for update amplitudes near zero. (b) A histogram of versus shows a slightly increasing, relatively linear trend. 80 bins for are equally spaced on a log scale. Black trace, mean values of . Red traces, mean ± 1 standard deviation.

(a)

(b)