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Tempo-induced transitions in polyrhythmic hand movements

  • We investigate the cognitive control in polyrhythmic hand movements as a model paradigm for bimanual coordination. Using a symbolic coding of the recorded time series, we demonstrate the existence of qualitative transitions induced by experimental manipulation of the tempo. A nonlinear model with delayed feedback control is proposed, which accounts for these dynamical transitions in terms of bifurcations resulting from variation of the external control parameter. Furthermore, it is shown that transitions can also be observed due to fluctuations in the timing control level. We conclude that the complexity of coordinated bimanual movements results from interactions between nonlinear control mechanisms with delayed feedback and stochastic timing components.

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Author:Ralf EngbertORCiDGND, Christian Scheffczyk, Ralf-Thomas Krampe, Mikhael Rosenblum, Jürgen KurthsORCiDGND, Reinhold KlieglORCiDGND
Series (Serial Number):NLD Preprints (paper 041)
Document Type:Preprint
Year of Completion:1997
Publishing Institution:Universität Potsdam
Release Date:2007/07/04
Organizational units:Humanwissenschaftliche Fakultät / Institut für Psychologie
Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie
Zentrale und wissenschaftliche Einrichtungen / Interdisziplinäres Zentrum für Dynamik komplexer Systeme
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik