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Wearable Sensor Based Stooped Posture Estimation in Simulated Parkinson's Disease Gaits.

Quoc Khanh Dang1, Han Gil Seo2, Duy Duong Pham3

  • 1Impedance Imaging Research Center (IIRC), Kyung Hee University, Seoul 02447, Korea. khanhdq8689@gmail.com.

Sensors (Basel, Switzerland)
|January 13, 2019
PubMed
Summary

Researchers developed a wearable sensor method to accurately measure stooped posture (SP) in Parkinson's disease patients during dynamic movements. This innovation offers a practical alternative to traditional methods for clinical assessment and daily life correction.

Keywords:
Parkinson’s diseaseaccelerometerstooped posture

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Area of Science:

  • Biomedical Engineering
  • Neurology
  • Rehabilitation Science

Background:

  • Stooped posture (SP) is an involuntary forward bending of the thoracolumbar spine common in Parkinson's disease.
  • Conventional SP measurement methods are limited to static or short-distance dynamic conditions.
  • There is a need for accurate dynamic SP measurement over long movement distances.

Purpose of the Study:

  • To propose and validate a practical method for accurately estimating stooped posture (SP) using wearable accelerometers.
  • To assess the feasibility of using accelerometers mounted on the neck or upper back for dynamic SP measurement.
  • To provide a tool for both clinical assessment and daily life correction of SP.

Main Methods:

  • Development of a novel method for estimating SP using accelerometers as wearable sensors.
  • Experiments conducted with simulated subjects to validate the proposed method.
  • Comparison of estimated SP angles with reference angles using neck and upper back sensor placements.

Main Results:

  • High correlation coefficients (0.96 for neck, 0.99 for back) between estimated and reference SP angles.
  • Low maximum absolute errors (0.9° for neck, 1.5° for back), indicating high accuracy.
  • Demonstrated feasibility of the wearable sensor system for dynamic SP estimation.

Conclusions:

  • The proposed accelerometer-based method provides accurate and practical estimation of stooped posture (SP) during dynamic movements.
  • This system can serve as a valuable tool for clinical assessment of Parkinson's disease patients.
  • The wearable sensor system has potential applications in daily life for monitoring and correcting stooped posture.