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Computerized Dynamic Posturography for Postural Control Assessment in Patients with Intermittent Claudication
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Using Accelerometer and Gyroscopic Measures to Quantify Postural Stability.

Jay L Alberts1,2,3,4, Joshua R Hirsch1,3, Mandy Miller Koop1

  • 1Department of Biomedical Engineering, Cleveland Clinic, OH;

Journal of Athletic Training
|April 7, 2015
PubMed
Summary
This summary is machine-generated.

An iPad2 accurately quantifies postural stability using its accelerometer and gyroscope. This affordable, portable device offers a viable alternative for clinical and field assessments of balance.

Keywords:
biomechanicsconcussionsmotor controlmotor function

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Area of Science:

  • Biomechanics
  • Human Movement Science
  • Medical Technology

Background:

  • Traditional methods for quantifying postural stability, such as force platforms and 3D motion-capture systems, are accurate but costly and require specialized equipment and personnel.
  • These limitations hinder the widespread clinical and field application of objective postural stability assessments.

Purpose of the Study:

  • To evaluate the efficacy of using an iPad2's accelerometer and gyroscope data for precise measurement of center-of-gravity (COG) movements.
  • To determine if consumer electronics devices can accurately quantify postural stability in healthy young adults.

Main Methods:

  • A controlled laboratory study involving 49 healthy young adults.
  • Participants performed the NeuroCom Sensory Organization Test (SOT) with an iPad2 secured at the sacral level.
  • Data from the iPad2 were compared against the gold-standard NeuroCom system using Bland-Altman analysis and mean absolute percentage error.

Main Results:

  • The iPad2 demonstrated good agreement with the NeuroCom system, with limits of agreement ranging from -2.9° to 1.3° across SOT conditions.
  • The maximum measurement error was within 2.9° across all conditions.
  • The iPad2 tracked center-of-gravity sway with an average error of 5.87%–10.42% compared to the NeuroCom system.

Conclusions:

  • The iPad2's hardware provides sufficiently precise and accurate data for quantifying postural stability.
  • The device's accuracy, portability, and affordability make it a practical tool for postural stability assessment in diverse settings.
  • This technology offers a promising, accessible solution for both clinical and field-based balance evaluations.