Abstract
Locomotion in the lamprey is characterised by rhythmic bursts of muscle activity which alternate left and right and exhibit a rostral-to-caudal delay. This paper will describe several ways in which modelling has been applied to the study of the central pattern generator (CPG) for this system. A simple network model of the basic rhythm generator has been investigated using both a large biophysical network simulation and a simple connectionist algorithm. Intersegmental coordination has been studied using mathematical analysis of the lamprey spinal cord as a chain of coupled nonlinear oscillators. The correlation between these two levels of modelling has been investigated by applying the mathematical analysis to a simulated connectionist network. The contributions each kind of modelling makes to our understanding of the locomotor CPG will be discussed.
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