4.3 Article

Assessing muscle compliance in stroke with the Myotonometer

期刊

CLINICAL BIOMECHANICS
卷 50, 期 -, 页码 110-113

出版社

ELSEVIER SCI LTD
DOI: 10.1016/j.clinbiomech.2017.10.013

关键词

Stroke; Muscle compliance; Myotonometer; Spasticity; Area under the curve (AUC)

资金

  1. National Institutes of Health [R01NS080839]
  2. Guangzhou Science and Technology Program [20170403003]
  3. Memorial Hermann Foundation

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Background This study explores changes of the intrinsic biomechanical property in the biceps brachii muscle after a hemispheric stroke using the Myotonometry technique. Methods: Nineteen subjects with chronic hemiplegia participated in the study. Myotonometer was used to measure tissue displacement when compression force was applied at 8 levels from 2.45 N to 19.6 N. Muscle displacement and compliance were determined and averaged over multiple trials. Findings: Statistical analysis indicated a significant decrease in muscle displacement and compliance in the spastic muscles compared with the contralateral side (muscle displacements: spastic: 4.51 (0.31) mm, contralateral: 5.74 (0.37) mm, p < 0.005; compliance: spastic: 0.17 (0.011) mm/N, contralateral: 0.22 (0.014) mm/N, p < 0.005). Correlation analysis, however, did not show any association between clinical assessments and myotonometric measurement (p > 0.1). Interpretation Alterations of muscle compliance in the spastic side reflect changes in the contractile or intrinsic mechanical properties after a stroke. Findings of the study have demonstrated high sensitivity and effectiveness of the Myotonometer in assessing muscle compliance changes.

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