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Evaluation of balance recovery stability from unpredictable perturbations through the compensatory arm and leg movements (CALM) scale
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Evaluation of balance recovery stability from unpredictable perturbations through the compensatory arm and leg movements (CALM) scale
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Evaluation of balance recovery stability from unpredictable perturbations through the compensatory arm and leg movements (CALM) scale
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Journal Article
Evaluation of balance recovery stability from unpredictable perturbations through the compensatory arm and leg movements (CALM) scale
2019
Overview
Following unpredictable large-magnitude stance perturbations diverse patterns of arm and leg movements are performed to recover balance stability. Stability of these compensatory movements could be properly estimated through qualitative evaluation. In the present study, we present a scale for evaluation of compensatory arm and leg movements (CALM) in response to unpredictable displacements of the support base in the mediolateral direction. We tested the CALM scale for intra- and inter-rater reliability, correlation with kinematics of arm and leg movement amplitudes, and sensitivity to mode (rotation, translation and combined) and magnitude (velocity) of support base displacements, and also to perturbation-based balance training. Results showed significant intra- and inter-rater coefficients of agreement, ranging from moderate (0.46-0.53) for inter-rater reliability in the arm and global scores, to very high (0.87-0.99) for inter-rater leg scores and all intra-rater scores. Analysis showed significant correlation values between scale scores and the respective movement amplitudes both for arm and leg movements. Assessment of sensitivity revealed that the scale discriminated the responses between perturbation modes, platform velocities, in addition to higher balance recovery stability as a result of perturbation-based balance training. As a conclusion, the CALM scale was shown to provide adequate integrative evaluation of compensatory arm and leg movements for balance recovery stability after challenging stance perturbations, with potential application in fall risk prediction.
Publisher
Public Library of Science,Public Library of Science (PLoS)
Subject
/ Adult
/ Analysis
/ Arm
/ Balance
/ Ecology and Environmental Sciences
/ Falls
/ Female
/ Humans
/ Leg
/ Lower Extremity - physiology
/ Male
/ Medicine and Health Sciences
/ Muscle Contraction - physiology
/ Muscle, Skeletal - physiology
/ Postural Balance - physiology
/ Posture
/ Recovery
/ Training
