Evoked EMG signal processing
First Claim
1. A method of separating dispersive and synchronous time varying myoelectric signals, comprising:
- repeatedly evoking the production of myoelectric signals in a muscle with triggering events;
storing myoelectric signal data representative of the produced myoelectric signals as temporal functions of the triggering events;
averaging the myoelectric signal data before any demodulation of the data to produce short latency signal data representative of the short latency components of the myoelectric signals;
demodulating the short latency signal data to obtain demodulated short latency signal data;
demodulating the myoelectric signal data before averaging;
averaging the demodulated myoelectric signal data to obtain combined data representative of short and long latency myoelectric signals; and
combining the combined data with the demodulated short latency signal data to isolate long latency signal data representative of long latency components of the myoelectric signals.
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Accused Products
Abstract
A method generates signal data which is representative of short and long latency components of myoelectric signals. Production of myoelectric signals is repeatedly evoked in a muscle with triggering events. Myoelectric signal data which is representative of the produced myoelectric signals is stored as a temporal function of the triggering events. The myoelectric signal data is averaged before it is demodulated to produce short latency signal data representative of the short latency components of the myoelectric signals. The myoelectric signal data is also demodulated before it is averaged to produce combined short and long latency signal data. The combined signal data is summed with the short latency signal data to isolate the long latency signal data.
326 Citations
21 Claims
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1. A method of separating dispersive and synchronous time varying myoelectric signals, comprising:
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repeatedly evoking the production of myoelectric signals in a muscle with triggering events; storing myoelectric signal data representative of the produced myoelectric signals as temporal functions of the triggering events; averaging the myoelectric signal data before any demodulation of the data to produce short latency signal data representative of the short latency components of the myoelectric signals; demodulating the short latency signal data to obtain demodulated short latency signal data; demodulating the myoelectric signal data before averaging; averaging the demodulated myoelectric signal data to obtain combined data representative of short and long latency myoelectric signals; and combining the combined data with the demodulated short latency signal data to isolate long latency signal data representative of long latency components of the myoelectric signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for generating signal data representative of short latency, long latency and combined short and long latency signal components of myoelectric signals, comprising:
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repeatedly evoking the production of myoelectric signals in a muscle with triggering events; storing myoelectric signal data representative of the myoelectric signals produced in the muscle as temporal functions of the triggering events; averaging the myoelectric signal data, before demodulating the myoelectric signal data, to produce short latency signal data representative of the short latency signal components of the myoelectric signals; demodulating the myoelectric signal data, before averaging the myoelectric signal data, to produce demodulated signal data; averaging the demodulated signal data to produce combined signal data representative of the short and long latency signal components of the myoelectric signals; and combining the short latency signal data with the combined signal data to produce long latency signal data representative of the long latency signal components of the myoelectric signals. - View Dependent Claims (10, 11, 12)
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13. A method for separating signal data representing short latency signal components of myoelectric signals from signal data representing long latency and short latency signal components of the myoelectric signals, comprising:
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triggering the production of myoelectric signals in a muscle a plurality of times with triggering events; storing myoelectric signal data, representative of the myoelectric signals, as temporal functions of the triggering events; averaging the myoelectric signal data before demodulating the data to produce short latency signal data representative of the short latency signal components of the myoelectric signals; demodulating the short latency signal data; demodulating the myoelectric signal data stored to produce demodulated myoelectric signal data; averaging the demodulated myoelectric signal data to obtain combined signal data representative of short and long latency myoelectric signals; and combining the short latency signal data with the combined signal data to obtain dispersive signal data representative of the long latency myoelectric signals. - View Dependent Claims (14, 15)
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16. A method of separating a plurality of signal components of myoelectric signals comprising:
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triggering, with a triggering event, myoelectric signals in a muscle; storing signal data representative of the myoelectric signals as a temporal function of the triggering event; repeating the steps of triggering and storing a plurality of times; averaging the signal data stored, before demodulating, to increase signal to noise ratio and to substantially eliminate components of the signal data representative of cortically generated myoelectric signals; demodulating the signal data which was averaged; demodulating the signal data stored, before averaging to produce demodulated signal data; averaging the demodulated signal data to obtain combined signal data representative of short and long latency myoelectric signals; and combining the short latency signal data with the combined signal data to produce dispersive data representative of long latency myoelectric signals. - View Dependent Claims (17, 18)
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19. A method of separating supraspinal originated electromyographic (EMG) signals from spinal originated EMG signals comprising:
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applying a triggering input to a muscle to induce EMG signals in the muscle; synchronizing detection of the EMG signals with the triggering input; storing data representative of the signals being detected as a time function of the triggering input; repeating the steps of applying, synchronizing and storing a plurality of times; averaging the data representative of the EMG signals which was stored, before demodulating, to produce an averaged signal representation representative of the spinal originated EMG signals; demodulating the averaged signal representation to obtain a demodulated averaged signal representation; demodulating the data stored to obtain demodulated data; averaging the demodulated data to obtain combined signal data representative of spinal and supraspinal originated EMG signals; and combining the demodulated averaged signal representation with the combined signal data to produce dispersive data representative of the supraspinal originated EMG signals. - View Dependent Claims (20, 21)
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Specification