(A) Schematics of the SRM. Free model parameters are highlighted within boxes. (B–G) SRM parameters obtained for all GCs of different ages: (B) voltage bias vb, (C) membrane filter , (D) postspike membrane potential deflection , (E) static voltage threshold , (F) postspike threshold deflection , and (G) voltage scaling factor . (H) Validation data (blue) and SRM prediction (red). Top: Subthreshold membrane potential. Middle: Spike raster plots of the recorded responses and SRM simulations. Bottom: Peri-stimulus time histogram (PSTHs) of the spike trains. (I) Time constants extracted from the tail of filter . Spearman’s correlation between age and population time constant (bootstrapped): , . (J) GC reliability vs. time constant of the filter . Spearman’s correlation: , . (K) Amplitudes of the filters and . Spearman’s correlation: , between age and , and , between age and . (L) GCs’ parameters projected on the linear discriminant analysis components subspace. The crosses represent the means of the age groups, connected by a blue line. In (B, E, G, I–L) small dots represent single neurons. In (B, E, G, I) long bars indicate means and short bars means ± 1 s.e.m. In (J, K) large dots and bars indicate means ± 1 s.e.m. In (C, D, F), lines with shaded areas indicate means ± 1 s.e.m.