Assessment of intersegmental coordination of rats during walking at different speeds - Application of continuous relative phase.

Autor: Raffalt PC; Julius Wolff Institute for Biomechanics and Musculoskeletal Regeneration, Charité - Universitätsmedizin Berlin, Berlin, Germany; Department of Biomedical Sciences, University of Copenhagen, Copenhagen, Denmark. Electronic address: peter-christian.raffalt@charite.de., Nielsen LR; Center of Neuroscience, University of Copenhagen, Copenhagen, Denmark., Madsen S; Department of Nutrition, Exercise and Sports, University of Copenhagen, Copenhagen, Denmark., Højberg LM; Department of Nutrition, Exercise and Sports, University of Copenhagen, Copenhagen, Denmark., Pingel J; Center of Neuroscience, University of Copenhagen, Copenhagen, Denmark; Department of Women's and Children's Health, Karolinska Institute, Stockholm, Sweden., Nielsen JB; Center of Neuroscience, University of Copenhagen, Copenhagen, Denmark., Alkjær T; Department of Biomedical Sciences, University of Copenhagen, Copenhagen, Denmark., Wienecke J; Department of Nutrition, Exercise and Sports, University of Copenhagen, Copenhagen, Denmark.
Jazyk: angličtina
Zdroj: Journal of biomechanics [J Biomech] 2018 May 17; Vol. 73, pp. 168-176. Date of Electronic Publication: 2018 Apr 04.
DOI: 10.1016/j.jbiomech.2018.03.045
Abstrakt: 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.
(Copyright © 2018 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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