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A mode hypothesis for finger interaction during multi-finger force-production tasks

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Abstract.

 Finger forces are known to change involuntarily during multi-finger force-production tasks, even when a finger's involvement in a task is not consciously changed (the enslaving effect). Furthermore, during maximal force-production (MVC) tests, the force produced by a given finger in a multi-finger task is smaller than the force generated by this finger in its single-finger MVC test (the force-deficit effect). A set of hypothetical control variables – modes – is introduced. Modes can be estimated based on individual finger forces during single-finger MVC tests. We show that a simple formal model based on modes with only one free parameter accounts for finger forces during a variety of multi-finger MVC tests. The free parameter accounts for the force-deficit effect, and its value depends only on the number of explicitly involved fingers. This approach offers a simple framework for the analysis of finger interaction during multi-finger actions.

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Authors and Affiliations

  1. UMR 6559 Mouvement et Perception, Faculté des Sciences du Sport, Université de la Méditerranée, CNRS, 163, Avenue de Luminy, CP 910, 13288 Marseille cedex 9, France, , , , , , FR

    Frédéric Danion

  2. Institut für Neuroinformatik, Ruhr-Universität Bochum, Bochum, Germany, , , , , , DE

    Gregor Schöner

  3. Department of Kinesiology, Pennsylvania State University, University Park, Pa., USA, , , , , , US

    Mark L. Latash, Sheng Li & Vladimir M. Zatsiorsky

  4. Department of Physical Therapy, University of Delaware, Newark, Del., USA, , , , , , US

    John P. Scholz

Authors
  1. Frédéric Danion
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  2. Gregor Schöner
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  3. Mark L. Latash
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  4. Sheng Li
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  5. John P. Scholz
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  6. Vladimir M. Zatsiorsky
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Additional information

Received: 7 December 2001 / Accepted in revised form: 17 April 2002

Correspondence to: F. Danion (e-mail: danion@laps.univ-mrs.fr, Tel.: +33-491-172265, Fax: +33-491-172252)

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Danion, F., Schöner, G., Latash, M. et al. A mode hypothesis for finger interaction during multi-finger force-production tasks. Biol. Cybern. 88, 91–98 (2003). https://doi.org/10.1007/s00422-002-0336-z

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  • DOI: https://doi.org/10.1007/s00422-002-0336-z

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