Fig. 4. Motor output recorded from first lateral nerves of three (anterior, middle and posterior) segmental ganglia separated by intervening segments. (A) Experimental setup. (B) Bursts propagated along VNC. Arrowheads signify the timing of highest amplitude spikes in bursts. Bars (indicated by solid triangles) are latencies. In this case, the distances between the anterior and middle electrodes, and middle and posterior electrodes, are 0.6 and 1.8 mm, respectively. (C) Propagation velocity of bursts along VNC (N=6). The propagation velocity was approximately 60–110 mm s–1, and increased with increasing octopamine concentration. Values are means ± S.D. A noticeable increase in propagation velocity was observed for octopamine concentrations between 10–6 mol l–1 and 10–3 mol l–1.
