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Reliability of a simple method for determining muscle fiber conduction velocity
Author(s) -
McIntosh Kyle C.D.,
Gabriel David A.
Publication year - 2012
Publication title -
muscle and nerve
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.025
H-Index - 145
eISSN - 1097-4598
pISSN - 0148-639X
DOI - 10.1002/mus.22268
Subject(s) - intraclass correlation , isometric exercise , reliability (semiconductor) , nerve conduction velocity , clockwise , electromyography , physical medicine and rehabilitation , biomedical engineering , consistency (knowledge bases) , medicine , mathematics , orthodontics , cardiology , physical therapy , anatomy , reproducibility , statistics , rotation (mathematics) , physics , geometry , power (physics) , quantum mechanics
This study evaluated the reliability of muscle fiber conduction velocity (MFCV) measurement. Methods: Forty healthy, young participants performed isometric dorsiflexion of the foot on 3 non‐consecutive days. The reliability of force, root‐mean‐square (RMS) amplitude of the surface electromyographic (sEMG) signal, and MFCV were evaluated using the intraclass correlational analysis of variance technique. Results: The means across test days for all measures exhibited slight changes (<5%) and were considered stable. All measures exhibited remarkable consistency within subjects as indicated by high intraclass correlation coefficients (0.83–0.98). Conclusions: The procedures resulted in highly reliable MFCV values, and included: (1) electric identification of motor points prior to electrode placement; (2) twitch identification of muscle fiber orientation to guide initial electrode placement; (3) rotation of electrodes clockwise or counter‐clockwise to maximize the similarity and delay of compound muscle action potentials across all detection surfaces; and (4) minimization of synergistic activity during voluntary contractions. Muscle Nerve, 2012