Article: Two calretinin-positive GABAergic cell types in layer 2/3 of the mouse neocortex provide different forms of inhibition.

Note: All measurements were performed at room temperature. Input resistances were derived from Ohm's law dividing the maximal averaged voltage deflection to 40 pA hyperpolarizing current pulses by the applied amplitude of the current pulse. Firing properties were analyzed upon 500 pA current injection for 1 s for all cell types. AP half widths and amplitude were measured on the first AP in the train upon depolarizing current injection at threshold level. AP attenuation and accommodation were measured as a change of initial amplitude and interspike interval at the beginning and at the end of the AP train. AHP duration was measured as the time from the end of the initial burst to the regular spiking part of the firing pattern. Vm = resting potential; IS = interspike; AHP = after-hyperpolarization. Attenuation and accommodation were expressed as percentage of initial amplitude and interspike interval to the vales measured at the end of AP train.