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Estimating dominant upper-limb segments during daily activity.

Brian Coley1, Brigitte M Jolles, Alain Farron

  • 1Laboratory of Movement Analysis and Measurement, Ecole Polytechnique Fédérale de Lausanne (EPFL), STI-Bat. ELH, CH-1015 Lausanne, Switzerland. brian.coley@epfl.ch

Gait & Posture
|June 22, 2007
PubMed
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This study introduces a new wearable sensor method to measure shoulder mobility during daily activities. The dominant arm showed greater activity, offering a new way to assess shoulder function in daily life.

Area of Science:

  • Biomechanics
  • Human Movement Analysis
  • Wearable Technology

Background:

  • Assessing shoulder function during daily activities is crucial for diagnosing and managing shoulder disorders.
  • Current methods often rely on subjective patient reports or limited clinical tests.
  • Objective, real-world functional assessment of shoulder mobility is needed.

Purpose of the Study:

  • To present a novel ambulatory system for evaluating shoulder functional assessment during daily activities.
  • To differentiate dominant from non-dominant shoulder usage using inertial sensors.
  • To objectively quantify upper-limb usage in healthy individuals for comparison.

Main Methods:

  • An ambulatory system with inertial sensors was attached to the humerus of 31 healthy volunteers.

Related Experiment Videos

  • Participants wore the system for 8 hours of daily life.
  • Shoulder mobility (angular velocities, accelerations) was calculated and compared between dominant and non-dominant sides every 5 seconds.

    • Main Results:

    • The dominant arm exhibited significantly higher activity than the non-dominant arm during standing and sitting postures.
    • Right-handed participants showed +20% activity in the dominant arm when standing and +24% when sitting.
    • Left-handed participants showed +15% activity when standing and +32% when sitting.
    • During walking, the usage of both arms was nearly identical.

    Conclusions:

    • The proposed method provides objective quantification of shoulder mobility and upper-limb usage during activities of daily living.
    • This system has the potential to aid in the assessment and management of various shoulder disorders.
    • Real-world data collection offers valuable insights into functional differences between dominant and non-dominant limbs.