Comparison of strain-gage and fiber-optic goniometry for measuring knee kinematics during activities of daily living and exercise
| Autor: | John Stephen Landry, Andrew Sexton, Abeer A. Mohamed, Chris A. McGibbon, James Beyea, Jennifer Baba |
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| Rok vydání: | 2012 |
| Předmět: |
Male
Engineering Movement Biomedical Engineering Wearable computer Kinematics Accelerometer law.invention Young Adult Gait (human) Match moving law Physiology (medical) Activities of Daily Living Humans Knee Exercise Simulation Strain gauge Optical Fibers Arthrometry Articular business.industry Rehabilitation Gyroscope Reference Standards Biomechanical Phenomena Goniometer Feasibility Studies Female Stress Mechanical business |
| Zdroj: | Journal of biomechanical engineering. 134(8) |
| ISSN: | 1528-8951 |
| Popis: | There is increasing interest in wearable sensor technology as a tool for rehabilitation applications in community or home environments. Recent studies have focused on evaluating inertial based sensing (accelerometers, gyroscopes, etc.) that provide only indirect measures of joint motion. Measurement of joint kinematics using flexible goniometry is more direct, and still popular in laboratory environments, but has received little attention as a potential tool for wearable systems. The aim of this study was to compare two goniometric devices: a traditional strain-gauge flexible goniometer, and a fiberoptic flexible goniometer, for measuring dynamic knee flexion/extension angles during activity of daily living: chair rise, and gait; and exercise: deep knee bends, against joint angles computed from a “gold standard” Vicon motion tracking system. Six young adults were recruited to perform the above activities in the lab while wearing a goniometer on each knee, and reflective markers for motion tracking. Kinematic data were collected simultaneously from the goniometers (one on each leg) and the motion tracking system (both legs). The results indicate that both goniometers were within 2–5 degrees of the Vicon angles for gait and chair rise. For some deep knee bend trials, disagreement with Vicon angles exceeded ten degrees for both devices. We conclude that both goniometers can record ADL knee movement faithfully and accurately, but should be carefully considered when high (>120 deg) knee flexion angles are required. |
| Databáze: | OpenAIRE |
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