| 摘要 |
The present invention relates to an appliance for the direct measurement, display, processing and transmission, remotely, of electromyographic signals (EMG) comprising: an electrical stimulator ( 1 ) comprising electrodes for the excitation of a peripheral motor nerve; a pair of electrodes ( 31 ), for the acquisition of the EMG response at the level of the muscle associated with this peripheral nerve; an acquisition chain ( 2 ) driven by a micro-controller ( 3, 39 ), presenting means of conditioning of the input signal, comprising at least one differential preamplifier ( 22, 33 ), a bandpass filter ( 25, 34 ) and an analog/digital converter (ADC) ( 26, 310 ), said acquisition chain ( 2 ) being linked, via a standardized interface ( 5 ), to a computer ( 4 ) comprising means of storage ( 9 ) and of display of the EMG signals acquired as well as an executable program for effecting the interface with the user ( 6 ) and utilizing the data stored; characterized in that the acquisition chain ( 2 ) comprises means of automatic adjustment of the amplification gain of the EMG signal ( 23, 24, 311, 38 ), via the microcontroller, in such a way that the EMG signal covers the largest possible part of the input voltage span of the ADC ( 26, 310 ), hence with conservation of resolution, when the amplitude of the EMG signal decreases.
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