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Example experiment showing a skipped heartbeat: extracellular recordings from 2 ipsilateral HE motor neurons and movement recordings of the heart segments they control (peristaltic coordination mode) in vivo (minimally dissected animals). Note that the 3rd burst of the HE(12) motor neuron has fewer spikes and a lower intraburst spike frequency compared with the others and that the corresponding heart segment does not constrict in this cycle.
