Gait variability is altered in older adults when listening to auditory stimuli with differing temporal structures

Jeffrey P. Kaipust, Denise McGrath, Mukul Mukherjee, Nicholas Stergiou

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

Gait variability in the context of a deterministic dynamical system may be quantified using nonlinear time series analyses that characterize the complexity of the system. Pathological gait exhibits altered gait variability. It can be either too periodic and predictable, or too random and disordered, as is the case with aging. While gait therapies often focus on restoration of linear measures such as gait speed or stride length, we propose that the goal of gait therapy should be to restore optimal gait variability, which exhibits chaotic fluctuations and is the balance between predictability and complexity. In this context, our purpose was to investigate how listening to different auditory stimuli affects gait variability. Twenty-seven young and 27 elderly subjects walked on a treadmill for 5 min while listening to white noise, a chaotic rhythm, a metronome, and with no auditory stimulus. Stride length, step width, and stride intervals were calculated for all conditions. Detrended Fluctuation Analysis was then performed on these time series. A quadratic trend analysis determined that an idealized inverted-U shape described the relationship between gait variability and the structure of the auditory stimuli for the elderly group, but not for the young group. This proof-of-concept study shows that the gait of older adults may be manipulated using auditory stimuli. Future work will investigate which structures of auditory stimuli lead to improvements in functional status in older adults.

Original languageEnglish (US)
Pages (from-to)1595-1603
Number of pages9
JournalAnnals of biomedical engineering
Volume41
Issue number8
DOIs
StatePublished - Aug 1 2013

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Time series
Exercise equipment
White noise
Restoration
Dynamical systems
Aging of materials

Keywords

  • Chaos
  • Complexity
  • Detrended Fluctuation Analysis
  • Fractal scaling
  • Locomotion
  • Metronome
  • Walking

ASJC Scopus subject areas

  • Biomedical Engineering

Cite this

Gait variability is altered in older adults when listening to auditory stimuli with differing temporal structures. / Kaipust, Jeffrey P.; McGrath, Denise; Mukherjee, Mukul; Stergiou, Nicholas.

In: Annals of biomedical engineering, Vol. 41, No. 8, 01.08.2013, p. 1595-1603.

Research output: Contribution to journalArticle

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