Two-dimensional spatial error distribution of key tensiomyographic parameters |
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| Affiliation: | 1. McCaig Institute for Bone & Joint Health, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada;2. Schulich School of Engineering, University of Calgary, Calgary, AB, Canada;3. Section of Orthopaedics, Department of Surgery, Foothills Hospital, Calgary, Alberta, Canada;4. Faculty of Kinesiology, University of Calgary, Calgary, AB, Canada;5. Bone & Joint Strategic Clinical Network, Alberta Health Services, AB, Canada;1. Department of Biomedical Engineering, National University of Singapore, Singapore;2. Pacific Translational Biomarkers, MRL, MSD, Singapore;1. Centre for Exercise and Sports Science Research (CESSR), School of Medical and Health Sciences, Edith Cowan University, Perth, Australia;2. Sport, Exercise and Life Sciences, The University of Northampton, Northampton, United Kingdom;1. Department of Construction and Manufacturing Engineering, University of Oviedo, Gijón, Spain;2. Department of Orthodontics and Dentofacial Orthopedics, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan |
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| Abstract: | Tensiomyography detects the contraction time (Tc) and amplitude (Dm) of muscle belly thickening during maximal isometric twitch contraction. The assessment of both parameters is highly reliable; however, it seems that their calculation depends on the measurement point. The aim of the study was to determine spatial relative error distribution of Tc and/or Dm within a two-dimensional array of 27 (3 × 9) measurement points in comparison to the reference point (RP) in 12 male participants (22.5 ± 3.1 years). The RPs were determined as follows: in the biceps brachii (BB) at 50% of the humerus length; in the erector spinae (ES) at the height of the iliac crest; in the vastus lateralis (VL), vastus medalis (VM), and rectus femoris (RF) at 30%, 20%, and 50% of femur length above the patella, respectively. The surface area under the 3% relative error in Dm (BB: 4.0; VL: 3.8; VM; 8.2; RF: 6.2; ES: 2.4 cm2) was lower than in Tc (BB: 6.9; VL: 3.8; VM; 4.6; RF: 9.5; ES: 3.7 cm2), yielding merged values (BB: 3.9; VL: 3.7; VM; 4.8; RF: 5.1; ES: 2.4 cm2). Dm show twice as steep relative error rate when moving away from the RP in comparison to Tc, which seems to be less sensitive to spatial sensor positioning. |
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| Keywords: | TMG Contraction time Maximal displacement Skeletal muscle MHC |
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