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Related Experiment Video

Updated: Jun 26, 2026

A Vibrotactile Feedback Device for Seated Balance Assessment and Training
09:13

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Published on: January 20, 2019

Unintentional balance destabilization system reliability studies.

Bertram Ezenwa1, Edith Burns

  • 1University of Wisconsin-Milwaukee, College of Health Sciences, USA. bezenwa@uwm.edu

Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference
|January 24, 2009
PubMed
Summary

Sudden unintentional balance destabilization system (UBDS) tests reveal prolonged neural and muscular response latencies in elders, unlike command-driven tasks. This difference may explain why some seniors fall despite performing well on clinical balance tests.

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Area of Science:

  • Biomedical Engineering
  • Neuroscience
  • Gerontology

Background:

  • Elderly individuals often experience falls, despite performing well in clinical balance tests.
  • Understanding the neural and muscular responses to balance disturbances is crucial for fall prevention strategies.

Purpose of the Study:

  • To investigate the reliability of a novel unintentional balance destabilization system (UBDS) test environment.
  • To compare neural and muscular response latencies between UBDS and command-driven balance tasks in older adults.
  • To identify potential new measures for predicting fall risk in the elderly.

Main Methods:

  • Eleven adults aged 60+ participated in the study.
  • Subjects performed balance tasks under sudden perturbation by UBDS and during command-driven sit-to-stand/stand-to-sit tasks.
  • Neural signals (forehead, neck) and muscle activity (legs) were recorded, with repeat testing for reliability.

Main Results:

  • UBDS testing consistently showed significantly prolonged neural and muscular response latencies compared to command-driven tasks.
  • UBDS test-retest reliability for latency was highly significant (p < 0.000001) for most participants.
  • Command-driven tasks showed no significant latency differences between test-retest trials (p > 0.8).

Conclusions:

  • The UBDS test environment reliably triggers prolonged response latencies in older adults when balance is suddenly perturbed.
  • These prolonged latencies, not detectable in command-driven tests, may represent a key factor in unintentional falls among the elderly.
  • This research suggests UBDS could offer a more sensitive measure for assessing fall risk in older populations.