Predicting the nonlinear shift of stable equilibria in interlimb rhythmic coordination
نویسندگان
چکیده
A major prediction of the elementary coordination dynamics of two contralateral limb segments in 1 : 1 frequency locking was tested. A shift in stable steady-state relative phase C#I from 0 and ST radians is induced by a difference Aw in the uncoupled frequencies of the segments. The elementary coordination dynamics, an order parameter equation in 4, predicts that equilibrium shift will be a third-order polynomial function of Aw with a cubic coefficient that is (a) positive when the control parameter is constant, and (b) negative when the control parameter decreases with Aw. The prediction was confirmed in an experiment that manipulated Aw through differential loadings and the control parameter through coupled frequency. Implications for the dynamical modelling of coordination were discussed. PsyclNFO classification: 2330
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