Abstract
Rhythmic movements of crayfish swimmerets are coordinated by a neural circuit that links their four abdominal ganglia. Each swimmeret is driven by its own small local circuit, or pattern-generating module. We modeled this networkas a chain of four oscillators, bidirectionally coupled to their nearest neighbors, and tested the model‘s ability to reproduce experimentally observed changes in intersegmental phases and in period caused by differential excitation of selected abdominal ganglia. The choices needed to match the experimental data lead to the followingpredictions: coupling between ganglia is asymmetric; the ascending and descending coupling have approximately equal strengths; intersegmental coupling does not significantly affect the frequency of the system; and excitation affects the intrinsic frequencies of the oscillators and might also change properties ofintersegmental coupling.
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Skinner, F.K., Kopell, N. & Mulloney, B. How Does the Crayfish Swimmeret System Work? Insights from Nearest-Neighbor Coupled Oscillator Models. J Comput Neurosci 4, 151–160 (1997). https://doi.org/10.1023/A:1008891328882
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DOI: https://doi.org/10.1023/A:1008891328882