Figure 7.

The spread of activity in parasagittal sections. A, The position of multielectrodes on a slice. The boundary between layers (the sSC and the dSC) is indicated by a white line. The white squares 1 and 2 show the stimulating electrodes in B and C, respectively. B, C, Computed color images of field potentials evoked from a biphasic pulse to the Stim 1 and Stim 2 electrodes and recorded from the remaining 63 electrodes in the presence of Bic. Representative images from n = 16 slices are shown.