Fig. 8. (A) One example each of the effects of bicuculline methiodide (BMI) iontophoresis in the dorsal posterior (DP) and precommand nuclei (PCN), and the effects of L-glutamate (L-Glu) iontophoresis immediately before and immediately after BMI iontophoresis. L-Glu iontophoretic currents consisted of –1 µA for 20 s, while BMI iontophoretic currents consisted of +100 nA for 4 min, each of which is shown as a horizontal bar beneath each column. (B) Excerpts from A of examples of different burst types occurring during BMI iontophoresis in DP and PCN. (C) Number of different burst types induced by BMI iontophoresis in DP and PCN. Values shown are means ± S.E.M. There were no significant differences in the numbers of any of the three burst types.