Spectral Analysis of Input Spike Trains by Spike-Timing-Dependent Plasticity
Figure 3
(A) Anticonvolution of a fictive correlogram (red curve) and a typical kernel function
(blue curve). The amount of LTP/LTD corresponds to the area under the curve of the product of the two functions. (B) Plot of a typical kernel
as a function of
(blue curve). It corresponds to (4) for log-STDP with the baseline parameters in Table 1, namely rise and decay time constants
and
in (29), respectively, and a purely axonal delay
. The related STDP learning window
is plotted in black dashed line and the mirrored PSP response in pink solid line. The effect of the axonal delay shifts both the
and the PSP in the same direction, which cancels out. (C) Variants of
for longer PSP time constants,
and
(purple curve); and for a dendritic delay
(green dashed-dotted curve). In contrast to
that does not play a role in (4),
shifts
to the right. The arrows indicate
.