Figure 9.

Testing the role of FN and the hemiconnectives in transmitting crawl-like drive to adjacent ganglia. A, Left, Schematic drawing indicating site of DA placement (shaded well; 100 μm DA), specific ganglia recorded, and location of cut Faivre's nerve. Right, Shaded recording corresponds to ganglion in DA (top trace) that exhibited robust fictive crawling [DP(16)]. Bottom trace shows crawl-like activity in adjacent posterior ganglion [DP(17)] after selective transection of the FN. B, Left, Schematic marking location of cut hemiconnectives. Right, Top trace shows DA-induced fictive crawling [DP(9)]. Bottom trace reveals the absence of any rhythmic DE-3 activity as a result of transecting the hemiconnectives.