Fig. 3. Swimming in the presence of glutamate antagonists. Left: Swimming induced by DP nerve stimulation (bar). Right: Spontaneous swim episode. Neither 50 mM DNQX nor 100 mM kynurenic acid eliminates the ability of the nerve cord to swim. Note that, in both instances, cell 204 becomes excited before the onset of swimming. Left and right panels are from different experiments. CALIBRATION: 5 mV, 2 s.