Figure 2.

The field responses evoked by stimulation in the sSC. A, The position of microelectrodes on a slice. The boundary between sSC and dSC is indicated by a white line. The electrode outlined in white was the stimulating electrode and the remaining 63 electrodes were recording electrodes. The responses from electrodes 1–4 are shown in B. B, Field potentials from representative electrodes 1–4 elicited by a biphasic pulse (positive 0.1 ms and negative 0.1 ms, 180 μA) to the stimulating electrode under four conditions, control (Cont), 10 μm Bic, 10 μm Bic and 50 μm APV (Bic+APV), and 10 μA Bic, 50 μm APV, and 10 μm CNQX (Bic+APV+CNQX). C, The same records shown within the dotted lines in B, but in a faster time sweep and focused on the events shortly after the electrical stimulation.