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Fig. 11. Pre-ecdysis-triggering hormone (PETH)-induced pre-ecdysis bursts in intact and individually isolated abdominal ganglia of pharate pupae in vitro. Asynchronous pre-ecdysis I bursts are very similar in (A) the intact chain of abdominal ganglia 1-8 (AG1-8) and (B) individually isolated ganglia following transection of connectives between each ganglion. Calibration bars: horizontal, 5 s; vertical, 10 µV.