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Computerized Dynamic Posturography for Postural Control Assessment in Patients with Intermittent Claudication
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Age differences in processing fluctuations in postural control across trials and across days.

Oliver Huxhold1, Shu-Chen Li, Florian Schmiedek

  • 1Center for Lifespan Psychology, Max Planck Institute for Human Development, Berlin, Germany. oliver.huxhold@dza.de

Psychology and Aging
|July 27, 2011
PubMed
Summary

Older adults show greater fluctuations in postural control across all timescales compared to younger adults. These age-related differences in sensorimotor processing fluctuations are linked to system robustness, impacting balance over time.

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Area of Science:

  • Neuroscience
  • Biomechanics
  • Gerontology

Background:

  • Postural control is crucial for maintaining balance and preventing falls, especially in older adults.
  • Sensorimotor processing fluctuations can impact performance on various timescales, from moment-to-moment to day-to-day.
  • Understanding age-related changes in these fluctuations is key to addressing mobility decline.

Purpose of the Study:

  • To investigate age-related differences in postural control fluctuations across multiple timescales.
  • To dissociate long-term trends from processing fluctuations in the sensorimotor system.
  • To explore the relationship between system robustness and age-related postural control variability.

Main Methods:

  • Measured postural control in 18 younger and 18 older adults over 45 weekdays.
  • Collected five trials per day to analyze moment-to-moment, trial-to-trial, and day-to-day fluctuations.
  • Employed statistical methods to control for fluctuations across different timescales.

Main Results:

  • Older adults exhibited significantly greater fluctuations in postural control than younger adults at all measured timescales.
  • Age differences in trial-to-trial and day-to-day fluctuations persisted even after accounting for faster timescale variability.
  • Increased fluctuations in older adults suggest potential age-related declines in sensorimotor system robustness.

Conclusions:

  • Age-related increases in intraindividual fluctuations of postural control are evident across multiple timescales.
  • These fluctuations are partly attributable to reduced low-level system robustness in older adults.
  • Findings suggest a cascading effect of reduced robustness across different sensorimotor processing timescales with aging.