Dependence of laminar locations. A, Fluorescence images showing two example reconstructed cells located in layers 2/3 and 4, respectively. The layer borders were indicated by dashed lines. B, Plots of the PSP response latency versus the cortical depth of recorded cells from pre-CP, CP, and adult mice. Red circles, Data from biocytin-labeled cells. Gray circles, Data from cells with estimated cortical depths. C, Plots of the ipsi–contra latency difference versus cell cortical depth.