Differentiating fall-prone and healthy adults using local dynamic stability

Research output: Contribution to journalArticle

107 Citations (Scopus)

Abstract

Variability in kinematic and spatio-temporal gait parameters has long been equated with stability and used to differentiate fallers from non-fallers. Recently, a mathematically rigorous measure of local dynamic stability has been proposed based on the non-linear dynamics theory to differentiate fallers from non-fallers. This study investigated whether the assessment of local dynamic stability can identify fall-prone elderly individuals who were unable to successfully avoid slip-induced falls. Five healthy young, four healthy elderly and four fall-prone elderly individuals participated in a walking experiment. Local dynamic stability was quantified by the maximum Lyapunov exponent. The fall-prone elderly were found to exhibit significantly lower local dynamic stability (i.e. greater sensitivity to local perturbations), as compared to their healthy counterparts. In addition to providing evidence that the increased falls of the elderly may be due to the inability to attenuate/control stride-to-stride disturbances during locomotion, the current study proposed the opportunity of using local dynamic stability as a potential indicator of risk of falling. Early identification of individuals with a higher risk of falling is important for effective fall prevention. The findings from this study suggest that local dynamic stability may be used as a potential fall predictor to differentiate fall-prone adults.

Original languageEnglish (US)
Pages (from-to)1860-1872
Number of pages13
JournalErgonomics
Volume51
Issue number12
DOIs
StatePublished - 2008
Externally publishedYes

Fingerprint

Accidental Falls
Nonlinear Dynamics
Locomotion
Gait
Biomechanical Phenomena
Walking
Kinematics
experiment
evidence
Experiments

Keywords

  • Elderly falls
  • Fall accidents
  • Falls
  • Gait
  • Local dynamic stability
  • Locomotion
  • Risk assessment
  • Slips and falls

ASJC Scopus subject areas

  • Human Factors and Ergonomics
  • Physical Therapy, Sports Therapy and Rehabilitation

Cite this

Differentiating fall-prone and healthy adults using local dynamic stability. / Lockhart, Thurmon; Liu, Jian.

In: Ergonomics, Vol. 51, No. 12, 2008, p. 1860-1872.

Research output: Contribution to journalArticle

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