Fig. 5. Responses to trans-ELL field stimulation. (A) Left: cell profile as a spatial reference. Right: CSD as a pseudocolor map with field potential recordings superimposed. (B) Selected CSD traces from A aligned with the corresponding height in the pseudocolor map in A. These show that the stimulus current peak (black dotted line) inverts (see arrows) somewhere between the ganglionic and granular layers; thus, current enters the cells all along the apical dendritic tree and leaves the cells close to the ventral pole, at the level of the axon initial segment and the basal dendrites.