Non-invasive deep muscle electromyography
First Claim
1. A method of conducting electromyography of a deep muscle of a patient non-invasively comprising:
- applying an array of mono-polar surface electromyography electrodes to the skin of a patient at a location that includes the deep muscle and superficial muscles;
recording electrical potentials of selected electrodes relative to at least one other electrode, the method being characterised in that the array of electrodes is arranged in one or more rings encircling a circumference of a part of the body of the patient in which the superficial muscles and the deep muscle being investigated are located;
recording the potential of at least selected electrodes relative to another electrode selected from a common reference electrode and other electrodes in the array;
processing the recorded potentials of at least some of said selected electrodes in order to determine, using approximations or algorithms, or both, a contribution being made by at least said deep muscle being investigated; and
wherein the contributions to the potentials of the electrodes attributable to each of the muscles encircled by the array including the superficial muscles is determined mathematically by resolving the electromyography signals into constituent components using a technique selected from independent component analysis (ICA) and an unmixing or matrix inversion technique to result in a derivation of the electromyography waveforms of both the deep and the superficial muscles.
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Abstract
A method and apparatus for conducting electromyography of a deep muscle non-invasively are provided. An array of suitable surface electromyography electrodes is arranged in one or more rings encircling a part of the human body in which a deep muscle being investigated is located. The potential of at least selected electrodes relative to another electrode selected from a common reference electrode (mono-polar) and other electrodes (bi-polar) in the array is recorded and the data is processed in respect of the recorded potentials of at least some of said selected electrodes in order to determine (optionally using approximations or algorithms, or both) the contribution being made by at least the deep muscle being investigated. Typically, this is done mathematically by resolving the electromyography signals into their constituent components using a suitable technique. Preferably, this is integrated with a static muscle imaging device that may use the same electrodes to obtain a static tomogram of the muscles encircled.
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Citations
7 Claims
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1. A method of conducting electromyography of a deep muscle of a patient non-invasively comprising:
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applying an array of mono-polar surface electromyography electrodes to the skin of a patient at a location that includes the deep muscle and superficial muscles; recording electrical potentials of selected electrodes relative to at least one other electrode, the method being characterised in that the array of electrodes is arranged in one or more rings encircling a circumference of a part of the body of the patient in which the superficial muscles and the deep muscle being investigated are located; recording the potential of at least selected electrodes relative to another electrode selected from a common reference electrode and other electrodes in the array; processing the recorded potentials of at least some of said selected electrodes in order to determine, using approximations or algorithms, or both, a contribution being made by at least said deep muscle being investigated; and wherein the contributions to the potentials of the electrodes attributable to each of the muscles encircled by the array including the superficial muscles is determined mathematically by resolving the electromyography signals into constituent components using a technique selected from independent component analysis (ICA) and an unmixing or matrix inversion technique to result in a derivation of the electromyography waveforms of both the deep and the superficial muscles. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of conducting non-invasive electromyography of a deep muscle of a patient, comprising the steps of:
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applying an array of mono-polar surface electromyography electrodes to the skin of the patient, wherein the array includes a plurality of surface electromyography electrodes arranged in one or more rings that encircle a circumference of a part of the human body in which both superficial muscles and the deep muscle being investigated are located; recording electrical potentials of selected electrodes relative to at least one other electrode selected from either a common reference electrode or another surface electromyography electrode in the array; and processing the recorded potentials of at least some of the selected electrodes using approximations or algorithms to determine a contribution made by at least the deep muscle being investigated.
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Specification