Reported access resistance values from <i>in vivo</i> whole-cell patch recordings of neurons in mouse, rat and cat cortex, compared with values from the present study.

Note the general tendency for smaller access resistances from recordings on younger animals. †: Recordings limited to Ra<60 MΩ. ††: Ra taken as the mean of the reported values for the “electrode resistance” corrected with the “residual access resistance” (see table 1 in [34]).