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Vernooij CA, Rao G, Perdikis D, Huys R, Jirsa VK, Temprado JJ. Functional coordination of muscles underlying changes in behavioural dynamics. Sci Rep 2016; 6:27759. [PMID: 27282349 PMCID: PMC4901262 DOI: 10.1038/srep27759] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Accepted: 05/24/2016] [Indexed: 01/21/2023] Open
Abstract
The dynamical systems approach addresses Bernstein’s degrees of freedom problem by assuming that the neuro-musculo-skeletal system transiently assembles and dismantles its components into functional units (or synergies) to meet task demands. Strikingly, little is known from a dynamical point of view about the functioning of the muscular sub-system in this process. To investigate the interaction between the dynamical organisation at muscular and behavioural levels, we searched for specific signatures of a phase transition in muscular coordination when a transition is displayed at the behavioural level. Our results provide evidence that, during Fitts’ task when behaviour switches to a different dynamical regime, muscular activation displays typical signatures of a phase transition; a reorganisation in muscular coordination patterns accompanied by a peak in the variability of muscle activation. This suggests that consistent changes occur in coordination processes across the different levels of description (i.e., behaviour and muscles). Specifically, in Fitts’ task, target size acts as a control parameter that induces a destabilisation and a reorganisation of coordination patterns at different levels of the neuro-musculo-skeletal system.
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Affiliation(s)
- Carlijn A Vernooij
- Aix-Marseille Université, CNRS, Institut des Sciences du Mouvement UMR 7287, 13288, 13009, Marseille, France
| | - Guillaume Rao
- Aix-Marseille Université, CNRS, Institut des Sciences du Mouvement UMR 7287, 13288, 13009, Marseille, France
| | - Dionysios Perdikis
- Aix Marseille Université, Inserm, Institut de Neurosciences des Systèmes UMR_S 1106, 13005, Marseille, France.,Max Planck Institute for Human Development, Center for Lifespan Psychology, Berlin, Germany
| | - Raoul Huys
- Aix Marseille Université, Inserm, Institut de Neurosciences des Systèmes UMR_S 1106, 13005, Marseille, France
| | - Viktor K Jirsa
- Aix Marseille Université, Inserm, Institut de Neurosciences des Systèmes UMR_S 1106, 13005, Marseille, France
| | - Jean-Jacques Temprado
- Aix-Marseille Université, CNRS, Institut des Sciences du Mouvement UMR 7287, 13288, 13009, Marseille, France
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