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Non-invasive deep muscle electromyography

  • US 9,687,168 B2
  • Filed: 07/29/2010
  • Issued: 06/27/2017
  • Est. Priority Date: 07/30/2009
  • Status: Expired due to Fees
First Claim
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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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