US 5,671,752 A · Diaphragm electromyography analysis method and system

Abstract

In the method and system for electromyographic analysis of a striated muscle, electromyographic signals produced by the muscle are detected by means of an array of electrodes passing through the center of the muscle depolarizing region. Each electromyographic signal comprises an electromyographic component and a noise component. The position of the center of the muscle depolarizing region is then determined by detecting a reversal of polarity of the electromyographic components of the signals. Finally, two signals of opposite polarities amongst the electromyographic signals are subtracted. The subtraction subtracts the noise components of the two signals from each other but adds the electromyographic components of the two signals together to produce an electromyographic signal of improved signal-to-noise ratio. Advantageously, the array of electrodes is a linear array of successive electrodes, the center of the muscle depolarizing region is located between the electrodes of a given pair of successive electrodes, and the two signals of opposite polarities detected through the two pairs of successive electrodes adjacent to the given pair on opposite sides thereof are subtracted.

Claims11

Dependent claims

A method for producing an electromyographic signal having an improved signal-to-noise ratio and related to a striated muscle defining a muscle depolarizing region with a center, comprising the steps of:

detecting electromyographic signals produced by the muscle by means of an array of electrodes passing through the center of the muscle depolarizing region, each electrode-detected electromyographic signal comprising an electromyographic component and a noise component;
detecting the position of the center of the muscle depolarizing region by detecting a reversal of polarity of the electromyograhic component of the electrode-detected electromyograhic signals;
and
subtracting a first electromyograhic signal detected by the electrodes of the array on a first side of the center of the muscle depolarization region, from a second electromyograhic signal detected by the electrodes of the array on a second side, opposite to said first side, of the center of the muscle depolarization region, wherein (a) the first electromyograhic signal has an electromyograhic component of a first polarity, (b) the second electromyograhic signal has an electromyograhic component of a second polarity opposite to said first polarity, (c) the subtraction subtracts the noise components of the first and second electromyograhic signals from each other but adds the respective electromyograhic components of said first and second electromyograhic signals together to produce said electromyograhic signal of improved signal-to-noise ratio.

1 more element

A system for producing an electromyographic signal having an improved signal-to-noise ratio and related to a striated muscle defining a muscle depolarizing region with a center, comprising:

an array of electrodes passing through the center of the muscle depolarizing region for detecting electromyographic signals produced by the muscle, each electrode-detected electromyographic signal comprising an electromyograhic component and a noise component;
means for detecting the position of the center of the muscle depolarizing region through a detection of a reversal of polarity of the electromyograhic component of said electrode-detected electromyograhic signals;
and
means for subtracting a first electromyograhic signal detected by the electrodes of the array on a first side of the center of the muscle depolarization region, from a second electromyograhic signal detected by the electrodes of the array on a second side, opposite to said first side, of the center of the muscle depolarization region, wherein (a) the first electromyograhic signal has an electromyograhic component of a first polarity, (b) the second electromyograhic signal has an electromyograhic component of a second polarity opposite to said first polarity, and (c) the subtraction subtracts the noise components of the first and second electromyograhic signals from each other but adds the respective electromyograhic components of said first and second electromyograhic signals together to produce said electromyograhic signal of improved signal-to-noise ratio.

1 more element

Dependencies are inferred from the claim text.

Diaphragm electromyography analysis method and system

Life of this patent

Diaphragm electromyography analysis method and system

Life of this patent

Abstract

Claims11