Characterizing the balance-dexterity task as a concurrent bipedal task to investigate trunk control during dynamic balance |
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| Affiliation: | 1. Key Laboratory of Cellular Function and Pharmacology of Jilin Province, Yanbian University, Yanji City, Jilin Province, 133002, China;2. Department of Physiology and Pathophysiology, College of Medicine, Yanbian University, Yanji City, Jilin Province, 133002, China;3. Cellular Function Research Center, Yanbian University, 977 GongYuan Road, Yanji City, Jilin Province, 133002, China;4. Department of Ophthalmology, Affiliated Hospital of Yanbian University, Yanji City, Jilin Province, 133000, China;1. Department of Biomedical Sciences, New York Institute of Technology College of Osteopathic Medicine, Old Westbury, NY 11568, United States;2. Department of Psychology, Quinnipiac University, Hamden, CT 06514, United States;3. Wadsworth Center, New York State Department of Health, Albany, NY 12208, United States;4. Department of Biomedical Sciences, School of Public Health, State University of New York at Albany, Albany, NY 12201, United States;1. Institute of Health Sciences, Dokuz Eylul University, Izmir, Turkey;2. Department of Physiotherapy and Rehabilitation, Faculty of Health Sciences, Izmir Katip Celebi University, Izmir, Turkey;3. Department of Neurology, Faculty of Medicine, Dokuz Eylul University, Izmir, Turkey;4. School of Physical Therapy and Rehabilitation, Dokuz Eylul University, Izmir, Turkey;1. Department of Sport Science, University of Innsbruck, Fürstenweg 185 A-6020 Innsbruck, Austria;2. Department of Physical Therapy, University of Phayao, 19 Moo 2 Maeka, Muang, Phayao 56000, Thailand |
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| Abstract: | The purpose of the study was to characterize the Balance-Dexterity Task as a means to investigate a concurrent bipedal lower-extremity task and trunk control during dynamic balance. The task combines aspects of single-limb balance and the lower-extremity dexterity test by asking participants to stand on one limb while compressing an unstable spring with the contralateral limb to an individualized target force. Nineteen non-disabled participants completed the study, and performance measures for the demands of each limb – balance and dexterous force control – as well as kinematic and electromyographic measures of trunk control were collected. Given five practice trials, participants achieved compression forces ranging from 100 to 139 N (mean 121.2 ± 12.3 N), representing 14.4–23.0% of body weight (mean 18.7 ± 2.4%), which were then presented as target forces during test trials. Dexterous force control coefficient of variation and average magnitude of the center of pressure (COP) resultant velocity were associated such that greater variability in force control was accompanied by greater COP velocity (R = 0.598, p = 0.007). Trunk coupling, quantified as the coefficient of determination (R2) of a frontal plane thorax and pelvis angle-angle plot, varied independently of any measure of balance or dexterous force control. The Balance-Dexterity Task is a continuous, dynamic balance task where bipedal coordination and trunk coupling can be concurrently observed and studied. |
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| Keywords: | Balance Perturbation Trunk control Bipedal |
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