Prosthesis preference is related to stride-to-stride fluctuations at the prosthetic ankle

Shane R. Wurdeman, Sara A Myers, Adam L. Jacobsen, Nicholas Stergiou

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The purpose of this study was to determine the relationship between stride-to-stride fluctuations and prosthesis preference. Thirteen individuals with unilateral, transtibial amputation consented to participate. Individuals walked on a treadmill for 3 min with their prescribed and an alternate prosthesis. Stride-to-stride fluctuations were quantified with the largest Lyapunov exponent (LyE) of each joint flexion/extension time series. The change in the LyE was calculated for each major lower-limb joint for both conditions. Participants indicated preference between the prostheses on a continuous visual analog scale. The change in the LyE was correlated with the degree of preference between the two prostheses at the prosthetic ankle. The change in the LyE of the prosthetic ankle was strongly related to the degree of preference (r = 0.629, p = 0.02). Thus, stride-to-stride fluctuations, quantified by the LyE, are strongly related to the patient's perception of the prosthesis. As a result, the LyE is the first objective measure to detect changes in gait that relate to the patient's perception of the prosthesis. The LyE should be further examined as a potentially effective prescriptive and outcome measure in prosthetic rehabilitation.

Original languageEnglish (US)
Pages (from-to)671-686
Number of pages16
JournalJournal of Rehabilitation Research and Development
Volume50
Issue number5
DOIs
StatePublished - Aug 30 2013

Fingerprint

Ankle
Prostheses and Implants
Joints
Visual Analog Scale
Gait
Amputation
Lower Extremity
Rehabilitation
Outcome Assessment (Health Care)

Keywords

  • Amputation
  • Dynamic stability
  • Dynamical system
  • Gait
  • Limb loss
  • Lyapunov exponent
  • Nonlinear dynamics
  • Outcomes
  • Perception
  • Rehabilitation
  • Transtibial
  • Variability

ASJC Scopus subject areas

  • Rehabilitation

Cite this

Prosthesis preference is related to stride-to-stride fluctuations at the prosthetic ankle. / Wurdeman, Shane R.; Myers, Sara A; Jacobsen, Adam L.; Stergiou, Nicholas.

In: Journal of Rehabilitation Research and Development, Vol. 50, No. 5, 30.08.2013, p. 671-686.

Research output: Contribution to journalArticle

@article{7ca5a1cdb57043a2830a516f9e78717a,
title = "Prosthesis preference is related to stride-to-stride fluctuations at the prosthetic ankle",
abstract = "The purpose of this study was to determine the relationship between stride-to-stride fluctuations and prosthesis preference. Thirteen individuals with unilateral, transtibial amputation consented to participate. Individuals walked on a treadmill for 3 min with their prescribed and an alternate prosthesis. Stride-to-stride fluctuations were quantified with the largest Lyapunov exponent (LyE) of each joint flexion/extension time series. The change in the LyE was calculated for each major lower-limb joint for both conditions. Participants indicated preference between the prostheses on a continuous visual analog scale. The change in the LyE was correlated with the degree of preference between the two prostheses at the prosthetic ankle. The change in the LyE of the prosthetic ankle was strongly related to the degree of preference (r = 0.629, p = 0.02). Thus, stride-to-stride fluctuations, quantified by the LyE, are strongly related to the patient's perception of the prosthesis. As a result, the LyE is the first objective measure to detect changes in gait that relate to the patient's perception of the prosthesis. The LyE should be further examined as a potentially effective prescriptive and outcome measure in prosthetic rehabilitation.",
keywords = "Amputation, Dynamic stability, Dynamical system, Gait, Limb loss, Lyapunov exponent, Nonlinear dynamics, Outcomes, Perception, Rehabilitation, Transtibial, Variability",
author = "Wurdeman, {Shane R.} and Myers, {Sara A} and Jacobsen, {Adam L.} and Nicholas Stergiou",
year = "2013",
month = "8",
day = "30",
doi = "10.1682/JRRD.2012.06.0104",
language = "English (US)",
volume = "50",
pages = "671--686",
journal = "Journal of rehabilitation R&D",
issn = "0748-7711",
publisher = "Rehabilitation Research and Development Service",
number = "5",

}

TY - JOUR

T1 - Prosthesis preference is related to stride-to-stride fluctuations at the prosthetic ankle

AU - Wurdeman, Shane R.

AU - Myers, Sara A

AU - Jacobsen, Adam L.

AU - Stergiou, Nicholas

PY - 2013/8/30

Y1 - 2013/8/30

N2 - The purpose of this study was to determine the relationship between stride-to-stride fluctuations and prosthesis preference. Thirteen individuals with unilateral, transtibial amputation consented to participate. Individuals walked on a treadmill for 3 min with their prescribed and an alternate prosthesis. Stride-to-stride fluctuations were quantified with the largest Lyapunov exponent (LyE) of each joint flexion/extension time series. The change in the LyE was calculated for each major lower-limb joint for both conditions. Participants indicated preference between the prostheses on a continuous visual analog scale. The change in the LyE was correlated with the degree of preference between the two prostheses at the prosthetic ankle. The change in the LyE of the prosthetic ankle was strongly related to the degree of preference (r = 0.629, p = 0.02). Thus, stride-to-stride fluctuations, quantified by the LyE, are strongly related to the patient's perception of the prosthesis. As a result, the LyE is the first objective measure to detect changes in gait that relate to the patient's perception of the prosthesis. The LyE should be further examined as a potentially effective prescriptive and outcome measure in prosthetic rehabilitation.

AB - The purpose of this study was to determine the relationship between stride-to-stride fluctuations and prosthesis preference. Thirteen individuals with unilateral, transtibial amputation consented to participate. Individuals walked on a treadmill for 3 min with their prescribed and an alternate prosthesis. Stride-to-stride fluctuations were quantified with the largest Lyapunov exponent (LyE) of each joint flexion/extension time series. The change in the LyE was calculated for each major lower-limb joint for both conditions. Participants indicated preference between the prostheses on a continuous visual analog scale. The change in the LyE was correlated with the degree of preference between the two prostheses at the prosthetic ankle. The change in the LyE of the prosthetic ankle was strongly related to the degree of preference (r = 0.629, p = 0.02). Thus, stride-to-stride fluctuations, quantified by the LyE, are strongly related to the patient's perception of the prosthesis. As a result, the LyE is the first objective measure to detect changes in gait that relate to the patient's perception of the prosthesis. The LyE should be further examined as a potentially effective prescriptive and outcome measure in prosthetic rehabilitation.

KW - Amputation

KW - Dynamic stability

KW - Dynamical system

KW - Gait

KW - Limb loss

KW - Lyapunov exponent

KW - Nonlinear dynamics

KW - Outcomes

KW - Perception

KW - Rehabilitation

KW - Transtibial

KW - Variability

UR - http://www.scopus.com/inward/record.url?scp=84882942946&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84882942946&partnerID=8YFLogxK

U2 - 10.1682/JRRD.2012.06.0104

DO - 10.1682/JRRD.2012.06.0104

M3 - Article

C2 - 24013915

AN - SCOPUS:84882942946

VL - 50

SP - 671

EP - 686

JO - Journal of rehabilitation R&D

JF - Journal of rehabilitation R&D

SN - 0748-7711

IS - 5

ER -