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Postural responses to multidirectional perturbations to the hand during stance

Conference Paper


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Abstract


  • Humans are easily able to maintain their balance while

    applying force with their hands to move or stabilize objects.

    Based on Newton’s laws, the applied force must be

    counteracted by ground reaction force (GRF) to maintain

    balance. However, because the GRF is partitioned between

    the two legs there is no unique solution. Furthermore, central

    nervous system (CNS) can employ an infinite number of

    muscle activation patterns to achieve ground reaction force

    (GRF) vectors needed to satisfy both the task-level goal and

    balance. This study examines the postural response when

    hand position must remain stable as an external force is

    applied in different directions during normal stance. We

    investigated whether the CNS uses an invariant strategy to

    compensate for forces acting in different directions.

Authors


  •   Forghani, Ali (external author)
  •   Rabipour, Sheida (external author)
  •   Milner, Theodore E. (external author)
  •   Stapley, Paul J.

Publication Date


  • 2010

Citation


  • Forghani, A., Rabipour, S., Milner, T. E. & Stapley, P. J. (2010). Postural responses to multidirectional perturbations to the hand during stance. The Proceedings of the 16th Biannual Conference of the Canadian Society for Biomechanics (pp. 163-163). Canada: Canadian Society for Biomechanics.

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=4289&context=hbspapers

Ro Metadata Url


  • http://ro.uow.edu.au/hbspapers/3237

Start Page


  • 163

End Page


  • 163

Place Of Publication


  • http://www.health.uottawa.ca/biomech/csb/Archives/CSB%202010%20proceedings_all%20papers.pdf

Abstract


  • Humans are easily able to maintain their balance while

    applying force with their hands to move or stabilize objects.

    Based on Newton’s laws, the applied force must be

    counteracted by ground reaction force (GRF) to maintain

    balance. However, because the GRF is partitioned between

    the two legs there is no unique solution. Furthermore, central

    nervous system (CNS) can employ an infinite number of

    muscle activation patterns to achieve ground reaction force

    (GRF) vectors needed to satisfy both the task-level goal and

    balance. This study examines the postural response when

    hand position must remain stable as an external force is

    applied in different directions during normal stance. We

    investigated whether the CNS uses an invariant strategy to

    compensate for forces acting in different directions.

Authors


  •   Forghani, Ali (external author)
  •   Rabipour, Sheida (external author)
  •   Milner, Theodore E. (external author)
  •   Stapley, Paul J.

Publication Date


  • 2010

Citation


  • Forghani, A., Rabipour, S., Milner, T. E. & Stapley, P. J. (2010). Postural responses to multidirectional perturbations to the hand during stance. The Proceedings of the 16th Biannual Conference of the Canadian Society for Biomechanics (pp. 163-163). Canada: Canadian Society for Biomechanics.

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=4289&context=hbspapers

Ro Metadata Url


  • http://ro.uow.edu.au/hbspapers/3237

Start Page


  • 163

End Page


  • 163

Place Of Publication


  • http://www.health.uottawa.ca/biomech/csb/Archives/CSB%202010%20proceedings_all%20papers.pdf