Shoulder,elbow, and wrist joint angle excursions vary by gesture during touchscreen interaction |
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| Affiliation: | 1. Department of Industrial Management, National Taiwan University of Science and Technology, Taipei, Taiwan, ROC;2. Division of Occupational Therapy, Department of Physical Medicine and Rehabilitation, Shuang Ho Hospital, Taipei Medical University, New Taipei City, Taiwan, ROC;1. Division of Physical Therapy, Department of Rehabilitation Medicine, University of Minnesota, United States;2. Rehabilitation Science, Department of Rehabilitation Medicine, University of Minnesota, United States;1. Department of Occupational Science and Technology, College of Health Sciences, University of Wisconsin-Milwaukee, Milwaukee, WI 53201, USA;2. Department of Biomedical Engineering, College of Engineering, Marquette University, Milwaukee, WI 53201, USA;3. Department of Orthopedic Surgery, Medical College of Wisconsin, Wauwatosa, WI 53201, USA;4. Department of Biomedical Engineering, College of Engineering and Applied Sciences, University of Wisconsin-Milwaukee, Milwaukee, WI 53201, USA;1. Institute of Movement and Neuroscience, German Sports University, Cologne, Germany;2. Faculty of Medical Engineering and Technomathematics, FH Aachen University of Applied Sciences, Aachen, Germany |
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| Abstract: | ![]()
Repeated gesturing on touchscreen computing devices has become part of professional, personal, or school use by persons of all ages. Few studies have compared kinematics among joint motions and gestures during touchscreen interaction. We aimed to quantify the relative contributions of the shoulder, elbow and wrist to completion of several gestures to aid understanding of touchscreen ergonomics. Joint angles of the shoulder, elbow, and wrist were recorded for 22 seated participants while they interacted with a 10.1″ tablet computer held on an easel. Joint excursions at the shoulder, elbow, and wrist were all on average ≤20° during touchscreen interaction. The greatest excursion measured was shoulder rotation for swipe right with a mean of 15.5(±6.0)°. Index finger tap on a touchscreen was completed by participants with less than 5° of mean joint excursion at the shoulder, elbow and wrist. Tap, pinch and stretch gestures demonstrated significantly more wrist flexion/extension (p < 0.05) than shoulder flexion/extension, ab/adduction and rotation. Also, swipe left, right and up involved more shoulder rotation (p < 0.05) than wrist flexion/extension. These results suggest that when gestures are repeated frequently, the relative risk of overuse injury at the shoulder, elbow, or wrist may depend on the gesture being repeated. |
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| Keywords: | Mobile computing Human computer interaction Ergonomics Upper limb Musculoskeletal disorders |
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