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Figure 5


Fig. 5. Activation of the CoG projection neurons CPN2 and MCN1, as well as the gastric mill rhythm, is triggered by poc stimulation. (Left) Before stimulation, CPN2 and MCN1 were weakly active and there was an ongoing pyloric rhythm (pdn) but no gastric mill rhythm (lgn, dgn). (Middle) After poc stimulation (15 Hz, 30 s), CPN2 and MCN1 were excited and the gastric mill rhythm was triggered. (Right) Expanded section from the middle panel showing that the activity of LG, MCN1 and CPN2 is interrupted in pyloric-time. Note that each such interruption occurs during activity of the pyloric pacemaker PD neuron (grey shading). Most hyperpolarized membrane potential: CPN2, –45 mV.





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