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Exploring coordination dynamics of the postural system with real-time visual feedback.

Elise Faugloire·Benoît G Bardy·Omar Merhi·Thomas A Stoffregen
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Abstract

Differential performance over a wide range of possible postural coordination modes was investigated using 16 ankle-hip relative phase patterns from 0 degrees to 337.5 degrees. Participants were instructed to produce each coordination mode with and without real time visual feedback. Feedback consisted of a Lissajous figure indicating the discrepancy between actual and requested ankle-hip relative phase. The results showed: (1) the presence of a unique attractor around the anti-phase pattern (relative phase approximately 180 degrees); (2) performance was similar with and without visual feedback; (3) the absence of an attractor for the in-phase pattern (relative phase approximately 20 degrees). The third result is not consistent with previous research in which both in-phase and anti-phase patterns emerged when they were not imposed [B.G. Bardy, L. Martin, T.A. Stoffregen, R.J. Bootsma, Postural coordination modes considered as emergent phenomena, J. Exp. Psychol. Hum. Percept. Perform. 25 (1999) 1284-1301; B.G. Bardy, O. Oullier, R.J. Bootsma, T.A. Stoffregen, Dynamics of human postural transitions, J. Exp. Psychol. Hum. Percept. Perform. 28 (1999) 499-514]. This finding indicates the strong dependency to task variation and instructions of postural pattern formation.

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AdultAnkle JointFeedbackFemaleHumansMaleMotor SkillsMovementPostural BalancePostureTime FactorsVisual PerceptionComparative StudyJournal ArticleResearch Support, Non-U.S. Gov'tResearch Support, U.S. Gov't, Non-P.H.S.

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Elise Faugloire, Benoît G Bardy, Omar Merhi, Thomas A Stoffregen. 2005-02-10. Exploring coordination dynamics of the postural system with real-time visual feedback.. https://doi.org/10.1016/j.neulet.2004.10.043

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