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английский) 3:
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Electromyography (EMG) signals were recorded synchronouslyfrom the upper trapezius, australia with a bipolarsurface EMG configuration (Neuroline 720 01 - k, Medicotesta / s, Ølstykke, denmark) and an interelectrode distanceof 2 cm [35]. the electrodes were positioned according toSENIAM guidelines [36]. the skin was abraded prior toapplying the electrodes to ensure an impedance of less than10 kΩ (over the impedance was 1 - 2 kΩ). if the impedancewas higher than 10 kΩ the procedure was repeated untilimpedance was less than 10 kΩ. the EMG electrodes.connected directly to small preamplifiers located near therecording site. the raw analogue EMG signals were ledthrough shielded wires to instrumental characters amplifiers,with a bandwidth of 10–400 hz and a common moderejection ratio better than 100 db. force and EMG signalsa sampled synchronously at 1000 hz using a 16 bit a / dconverter (DAQ card - al - 16XE - 50, national instruments,usa) and stored on a laptop for further analysis.
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