EMG normalization method based on grade 3 of manual muscle testing: Within- and between-day reliability of normalization tasks and application to gait analysis

Article Article scientifique Article EMG normalization method based on grade 3 of manual muscle testing: Within- and between-day reliability of normalization tasks and application to gait analysis eng 2017 author Tabard Anne 849081 author Rose-Dulcina Kevin 0000-0002-8698-3268 833620 author Pittet Vincent 633032 author Dayer Romain Olivier Pierre 502314 author Vuillerme Nicolas author Armand Stéphane 0000-0001-9144-4982 636265 6-12 10.1016/j.gaitpost.2017.10.026 29121510 0966-6362 http://www.sciencedirect.com/science/article/pii/S0966636217309803 Electromyography (EMG) is an important parameter in Clinical Gait Analysis (CGA), and is generally interpreted with timing of activation. EMG amplitude comparisons between individuals, muscles or days need normalization. There is no consensus on existing methods. The gold standard, maximum voluntary isometric contraction (MVIC), is not adapted to pathological populations because patients are often unable to perform an MVIC. The normalization method inspired by the isometric grade 3 of manual muscle testing (isoMMT3), which is the ability of a muscle to maintain a position against gravity, could be an interesting alternative. The aim of this study was to evaluate the within- and between-day reliability of the isoMMT3 EMG normalizing method during gait compared with the conventional MVIC method. Lower limb muscles EMG (gluteus medius, rectus femoris, tibialis anterior, semitendinosus) were recorded bilaterally in nine healthy participants (five males, aged 29.7±6.2years, BMI 22.7±3.3kgm(-2)) giving a total of 18 independent legs. Three repeated measurements of the isoMMT3 and MVIC exercises were performed with an EMG recording. EMG amplitude of the muscles during gait was normalized by these two methods. This protocol was repeated one week later. Within- and between-day reliability of normalization tasks were similar for isoMMT3 and MVIC methods. Within- and between-day reliability of gait EMG normalized by isoMMT3 was higher than with MVIC normalization. These results indicate that EMG normalization using isoMMT3 is a reliable method with no special equipment needed and will support CGA interpretation. The next step will be to evaluate this method in pathological populations. EMG EMG normalization Gait Manual muscle testing Within- and between-day reliability Dewey 617 Dewey 618 57 Département de chirurgie 222 58 Département de pédiatrie, gynécologie et obstétrique 223 false 574 Groupe Lascombes Pierre (orthopédie pédiatrique) 917 900 Laboratoire de cinésiologie 943 Gait & Posture 60 2fe29f2d-5dff-43d1-b307-175920d06a62 Article (Published version) Restricted 1-s2.0-S0966636217309803-main.pdf 656366 application/pdf restrictedAccess Faculté de médecine / Section de médecine clinique / Département de chirurgie Faculté de médecine / Section de médecine clinique / Département de pédiatrie, gynécologie et obstétrique

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EMG normalization method based on grade 3 of manual muscle testing: Within- and between-day reliability of normalization tasks and application to gait analysis	Gait & Posture	2017	532	1
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