Electromyography (EMG) de signaux were recorded synchronouslyFrom the Upper trapezius muscle with a des troubles bipolairesSurface EMG configuration (Neuroline 720 01-K, Medicotest- A / s, lstykke, Denmark) and an interelectrode distanceOf 2 cm [35]. The électrodes were positionné according toSENIAM Guidelines [36]. The peau was abraded prior toApplying the électrodes to ensure une impédance of less than10 k (typically the impédance was - 2 K (Omega). If the est importanteWas higher than 10 k the Procedure was repeated untilimpedance was less than 10 k. The EMG électrodes wereSont directly to Small preamplifiers located near theRecording site. The Raw analogue EMG de signaux were delThrough Shielded fils to instrumental differentiation amplificateursWith a la largeur de bande of 10 - 400 Hz and a Common Mode100 db rejection ratio better than. Force and EMG de signauxWere sampled synchronously at 1000 Hz Using a de 16 bits A / DConvertisseur (DAQ Card-Al-16XE-50, National Instruments,Les États - Unis d'Amérique) and stockées sur un ordinateur for Further Analysis.
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