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Age-related differences in locomotor targeting performance under structural interference.

William P Berg1, Leslie A Murdock

  • 1Department of Kinesiology and Health, Miami University, Oxford, OH 45056, USA. bergwp@muohio.edu

Age and Ageing
|March 30, 2011
PubMed
Summary
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Older adults show reduced locomotor targeting accuracy under structural interference due to greater attention demands. This age-related decline in visual attention switching may impair walking performance.

Area of Science:

  • Gerontology
  • Biomechanics
  • Cognitive Neuroscience

Background:

  • Locomotor targeting (LT) is crucial for safe navigation.
  • Age-related changes in attention and gait control are significant concerns.

Purpose of the Study:

  • To investigate age-related differences in locomotor targeting (LT) and step length (SL) regulation.
  • To examine performance under varying levels of structural interference.

Main Methods:

  • Forty older and younger adults performed LT tasks under control, low, and high structural interference conditions.
  • Interference involved simultaneous visual identification tasks requiring altered gaze.
  • Outcome measures included LT error, SL, and SL adjustment patterns.

Main Results:

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  • Structural interference significantly impaired LT accuracy in older adults but not younger adults.
  • Older adults adopted a more conservative gait with shorter SLs under interference.
  • No age-related differences were found in the distribution of SL adjustments.

Conclusions:

  • LT requires more attention in older adults, leading to reduced accuracy under interference.
  • Impaired visual attention switching may contribute to age-related declines in walking performance.
  • These findings highlight the impact of cognitive load on gait in older populations.