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Motor Dual-Tasks for Gait Analysis and Evaluation in Post-Stroke Patients
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Age-related effects on postural control under multi-task conditions.

Urs Granacher1, Stephanie A Bridenbaugh, Thomas Muehlbauer

  • 1Institute of Exercise and Health Sciences, University of Basel, Basel, Switzerland. urs.granacher @ unibas.ch

Gerontology
|October 29, 2010
PubMed
Summary
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Elderly adults exhibit poorer postural control, especially during dual-tasking, highlighting age-related declines. Fall-risk assessment should include dynamic measures under multi-task conditions for older individuals.

Area of Science:

  • Gerontology
  • Biomechanics
  • Neuroscience

Background:

  • Simultaneous cognitive (CI) and/or motor interference (MI) tasks impact postural sway and gait.
  • These changes are linked to an increased fall risk in older adults.

Purpose of the Study:

  • To examine the effects of CI and/or MI tasks on static and dynamic postural control in young and elderly adults.
  • To determine associations between static and dynamic postural control during concurrent task performance.

Main Methods:

  • 36 healthy young (n=18) and elderly (n=18) adults participated.
  • Static postural control assessed during bipedal stance.
  • Dynamic postural control measured during walking on an instrumented walkway.

Main Results:

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Experimental Methods to Study Human Postural Control
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  • Elderly participants displayed greater center-of-pressure displacements and stride-to-stride variability than younger adults, irrespective of task condition.
  • Correlations between static and dynamic postural control measures were observed only under single-task conditions in the elderly.

Conclusions:

  • Age-related deficits in the postural control system are primary drivers of observed results.
  • Weak correlations suggest fall-risk assessment should integrate dynamic measures during multi-tasking.
  • Erect standing and walking skills may be independent and require complementary training.