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Estimation of a midfoot joint center in typically developed adults using functional calibration methods
Affiliation:1. Doctor of Physical Therapy Program, Indiana Wesleyan University, USA;2. Department of Orthopaedic Surgery, Hallym University Dongtan Sacred Heart Hospital, Medical College of Hallym University, Republic of Korea;1. School of Public Health, University of Hong Kong, Hong Kong Special Administrative Region of China;2. Department of Health and Physical Education, Education University of Hong Kong, Hong Kong Special Administrative Region of China;3. School of Nursing and Health Studies, Hong Kong Metropolitan University, Hong Kong Special Administrative Region of China;4. Graduate School of Public Health and Health Policy, City University of New York, New York, USA;5. Department of Sport, Physical Education and Health, Hong Kong Baptist University, Hong Kong Special Administrative Region of China;6. Korea National Rehabilitation Center, Department of Healthcare and Public Health, Rehabilitation Research Institute, Seoul 01022, the Republic of Korea;7. Department of Rehabilitation Sciences, Hong Kong Polytechnic University, Hong Kong Special Administrative Region of China;1. Center for Limb Loss and Mobility, VA Puget Sound Health Care System, Seattle, WA, United States;2. DoD-VA Extremity Trauma and Amputation Center of Excellence, United States;3. Department of Mechanical Engineering, University of Washington, Seattle, WA, United States;4. Henry M. Jackson Foundation, Bethesda, MD, United States,;5. Department of Kinesiology, University of Maryland, College Park, MD, United States;6. Neuroscience and Cognitive Science Program, University of Maryland, College Park, MD, United States;1. Department of Mechanical and Industrial Engineering, Montana State University, Bozeman, MT, USA;2. Ohio Musculoskeletal and Neurological Institute (OMNI), Ohio University, Athens, OH, USA;3. School of Applied Health Sciences and Wellness, College of Health Sciences & Professions, Ohio University, Athens, OH, USA;4. School of Rehabilitation and Communication Sciences, College of Health Sciences & Professions, Ohio University, Athens, OH, USA;1. Osaka Prefecture University, Habikino City, Osaka, Japan;2. Pacific Supply co. Ltd., Daito City, Osaka, Japan;3. Department of Biomedical Engineering, Faculty of Engineering, The Hong Kong Polytechnic University, Hong Kong, China;1. University of North Texas Health Science Center, Department of Physical Therapy, 3500 Camp Bowie Blvd, Fort Worth, TX 76107, USA;2. Peterson Regional Medical Center, Ambulatory Care Center, 260 Cully Drive, Kerrville, TX 78028, USA;3. Angelo State University, Physical Therapy Department, ASU Station #10923, San Angelo, Texas 76909, USA
Abstract:BackgroundThere are detailed findings on hip and knee joint parameters determined via functional calibration methods for use in instrumented 3D-gait analysis but these methods have not yet been addressed to the foot.Research questionAre functional calibration methods feasible for determining foot joint parameters and may they help for clinical interpretation of foot deformities?MethodsRigid segments were formed by markers on forefoot and hindfoot via a least square method. The position of the midfoot joint articulating both foot segments was then determined via a functional calibration motion. This two-stage procedure was applied on a cohort of 17 typically developed adults and one subject with severe planovalgus foot deformity for determining the location of the midfoot joint and kinematics of hindfoot and forefoot.ResultsThe position of the midfoot joint center could be estimated in the typically developed cohort and also in the demonstration case with planovalgus foot deformity. Depending on the choice of marker set for hindfoot and forefoot, the position of the joint center varied in the anatomic midfoot region with most robust results when addressing the marker on the navicular to the hindfoot.ConclusionThe presented method for joint center determination within the foot and the characteristic results of the foot joint angles appear promising for typically developed feet. However, further validation of the method is needed for application in clinical context.
Keywords:Multi-segment foot model  Ankle joint parameters  Functional methods  Functional calibration
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