Assessment of intersegmental coordination of rats during walking at different speeds – Application of continuous relative phase |
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| Institution: | 1. Julius Wolff Institute for Biomechanics and Musculoskeletal Regeneration, Charité – Universitätsmedizin Berlin, Berlin, Germany;2. Department of Biomedical Sciences, University of Copenhagen, Copenhagen, Denmark;3. Center of Neuroscience, University of Copenhagen, Copenhagen, Denmark;4. Department of Nutrition, Exercise and Sports, University of Copenhagen, Copenhagen, Denmark;5. Department of Women’s and Children’s Health, Karolinska Institute, Stockholm, Sweden;1. REVAL Rehabilitation Research, Faculty of Rehabilitation Sciences, Hasselt University, Agoralaan Building A - B-3590 Diepenbeek, Diepenbeek, Belgium;2. Faculty of Medicine and Health Sciences, University of Antwerp, Universiteitsplein 1, B-2610 Wilrijk, Belgium;3. Clinical Motion Analysis Laboratory, CERM, University Hospital Pellenberg, Welligerveld 1, B-3212 Pellenberg, Belgium;4. Department of Rehabilitation Sciences, Faculty of Kinesiology and Rehabilitation Sciences, KU Leuven, Tervuursevest 101, B- 3001 Heverlee, Belgium;5. Department of Biology, Functional Morphology, University of Antwerp, Universiteitsplein 1, B- 2610 Wilrijk, Belgium;1. Department of Information Engineering, Università Politecnica delle Marche, 60131 Ancona, Italy;2. Posture and Movement Analysis Laboratory, Italian National Institute of Health and Science on Aging (INRCA), 60131 Ancona, Italy;1. School of Sport and Exercise Science, University of Lincoln, UK;2. School of Sport and Health Sciences, Cardiff Metropolitan University, UK;3. Sport and Health Sciences, University of Exeter, UK;1. National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu 610065, PR China;2. Science Lab, Zhejiang Red Dragonfly Footwear Co., LTD., Zhejiang Province, Wenzhou 325100, PR China;1. Centre de recherche interdisciplinaire en réadaptation (CRIR), Institut de réadaptation Gingras-Lindsay de Montréal (IRGLM) du CIUSSS Centre-Sud-de-l''île-de-Montréal, Québec, Canada;2. École de réadaptation, Université de Montréal, Québec, Canada;3. Centre interdisciplinaire de recherche en réadaptation et intégration sociale (CIRRIS), CIUSSS de la Capitale-Nationale, Québec, Canada;4. Département de réadaptation, Faculté de médecine, Université Laval, Québec, Canada |
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| Abstract: | The present study investigated the feasibility and reliability of continuous relative phase (CRP) and deviation phase (DP) to assess intersegmental hind limb coordination pattern and coordination variability in rats during walking. Twenty-six adult rats walked at 8 m/min, 12 m/min and 16 m/min while two-dimensional kinematics were recorded. Segment angles and segment angular velocities of the paw, shank and thigh on the left hind-limb were extracted from 15 strides and CRP was calculated for the paw-shank and shank-thigh coupling. The effect of walking speed on the time point average curve of the CRP (ACRP) and DP and on the mean ACRP and mean DP was established by statistical parametric mapping (SPM) and a one-way ANOVA for repeated measures. Absolute and relative reliability were assessed by measurement error and intra-class correlation coefficient. The SPM analysis revealed time dependent differences in the effect of speed. Thus, the CRP of the paw-shank coupling decreased with increasing speed during most of the gait cycle while the CRP of the shank-thigh coupling was decreased during the swing phase. The session-to-session reliability was fair to good for the coordination measure and poor for the variability measure. |
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| Keywords: | Coordination Locomotion Rodents Speed |
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