Nonlinear dynamic measures for evaluating postural control in individuals with and without chronic ankle instability

Masafumi Terada, Sara Carey, Brian Pietrosimone, Heather Whitaker, Megan Beard, Kate Pfile, Elizabeth Rullestad, Phillip Gribble

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

This study aimed to compare time-to-boundary and sample entropy during a single-leg balance task between individuals with chronic ankle instability (CAI), lateral ankle sprain copers, and healthy controls. Twenty-two participants with CAI, 20 lateral ankle sprain copers, and 24 healthy controls performed a single-leg balance task during an eyes-closed condition. Participants with CAI exhibited lower time-to-boundary values compared with lateral ankle sprain copers and healthy controls. However, we did not find differences in sample entropy variables between cohorts. A decrease in time-to-boundary values in participants with CAI indicated that CAI may constrain the ability of the sensorimotor system to maintain the center of pressure within the boundaries of the base of support. However, the regularity of the center of pressure velocity time series appears not to be altered in the CAI cohort in this study.

Original languageEnglish
Pages (from-to)243-261
Number of pages19
JournalMotor Control
Volume23
Issue number2
DOIs
StatePublished - 2019

Bibliographical note

Publisher Copyright:
© 2019 Human Kinetics, Inc.

Keywords

  • Balance
  • Copers
  • Joint injury
  • Movement variability
  • Sensorimotor system

ASJC Scopus subject areas

  • Physical Therapy, Sports Therapy and Rehabilitation
  • Clinical Neurology
  • Physiology (medical)

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