Fig. 5. Recordings from the posterior esophageal constrictor motorneurons (pEC MNs) located in the frontal ganglion and concurrent extracellular suction electrode recordings from the foregut musculature from anterior and posterior esophageal constrictor (aEC, pEC) muscles. (A) Examples of intracellular recordings from a pEC MN in an intermolt 5th instar larva. (B) Recording from an early-molt stage larva. Despite the dramatic decrease in foregut motility during the early-molt, the pattern of activity recorded appears similar to that observed in intermolt animals. Scale bars, 25 mV and 2 s.