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  • The effect of perturbation onset timing and length on tripping recovery strategies

    Author(s)
    Shirota, Camila
    Simon, Ann M
    Rouse, Elliott J
    Kuiken, Todd A
    Griffith University Author(s)
    Shirota, Camila
    Year published
    2011
    Metadata
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    Abstract
    In control subjects, trips during the early and late swing phase of walking elicit elevating and lowering strategies, respectively. However, the transition between these recovery strategies during mid-swing is unclear. A better understanding of this transition would provide insight into what factors cause individuals to choose one strategy over another. Three control subjects walked on a treadmill while attached to a custom-made tripping device. Perturbations of various lengths (ranging from 50 ms to 350 ms) were applied throughout the swing phase of gait. The results suggest that as perturbation length increased, the ...
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    In control subjects, trips during the early and late swing phase of walking elicit elevating and lowering strategies, respectively. However, the transition between these recovery strategies during mid-swing is unclear. A better understanding of this transition would provide insight into what factors cause individuals to choose one strategy over another. Three control subjects walked on a treadmill while attached to a custom-made tripping device. Perturbations of various lengths (ranging from 50 ms to 350 ms) were applied throughout the swing phase of gait. The results suggest that as perturbation length increased, the transition from elevating to lowering strategies occurred at earlier perturbation onsets. The transition period varied linearly with perturbation length. Perturbation lengths of 150 ms to 250 ms more closely replicated strategy selection in trips induced by real obstacles. Perturbations that are longer in duration force the transition from an elevating to a lowering strategy to occur at an earlier percentage of swing. These results show that perturbation length affects recovery strategy selection in response to trips. © 2011 IEEE.
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    Conference Title
    2011 Annual International Conference of the IEEE Engineering in Medicine and Biology Society
    DOI
    https://doi.org/10.1109/IEMBS.2011.6091930
    Subject
    Science & Technology
    Engineering, Biomedical
    Engineering, Electrical & Electronic
    Publication URI
    http://hdl.handle.net/10072/401073
    Collection
    • Conference outputs

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