METHOD AND DEVICE FOR MEASURING MUSCLE SIGNALS
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Accused Products
Abstract
In order to determine the state of a muscle between a normal non-tired state, a tired state and a passive involuntary tension state, a signal from the muscle is recorded at rest by using an electrode arrangement, where an earth body may prevent the electrodes from picking up signals beyond the extent of the earth body. The frequency content of the signal is determined by spectral analysis, e.g. by computing a moment of the spectrum. A normal frequency content indicates a non-tired muscle state, whereas a low and a high frequency content indicate a tired and a passive involuntary tension muscle state. A mapping is used to improve accuracy of state determination, e.g. with a reference database.
45 Citations
37 Claims
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1-20. -20. (canceled)
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21. An electrode arrangement for use in a muscle state analyzer, said electrode arrangement comprising:
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at least two electrodes of conducting material arranged to make contact with the skin when said electrode arrangement is operated, said at least two electrodes forming at least one electrode pair for picking up a muscle signal, and an electrical insulator surrounding at least one of said at least two electrodes, said electrode arrangement characterized in that the electrode arrangement further comprises; in addition to said at least two electrodes, an earth body of a conducting material arranged to make contact with the skin when said electrode arrangement is operated, said earth body surrounding said at least two electrodes to limit said at least two electrodes from picking up a signal from outside of the extent of said earth body. - View Dependent Claims (22, 23, 24, 29, 30, 31, 32, 33)
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25. An apparatus for measuring a muscle signal, comprising:
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a unit for processing said signal measured from a muscle, at least two electrodes of conducting material arranged to make contact with the skin when said electrode arrangement is operated, said at least two electrodes forming at least one electrode pair for picking up a muscle signal, and an electrical insulator surrounding at least one of said at least two electrodes, said electrode arrangement characterized in that the electrode arrangement further comprises; in addition to said at least two electrodes, an earth body of a conducting material arranged to make contact with the skin when said electrode arrangement is operated, said earth body surrounding said at least two electrodes to limit said at least two electrodes from picking up a signal from outside of the extent of said earth body. - View Dependent Claims (26, 27, 28)
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34. An electrode device for measuring muscle signals, said electrode device comprising:
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at least two electrodes of conducting material arranged to make contact with the skin when said electrode device is used, said at least two electrodes forming at least one electrode pair for picking up a muscle signal, and an electrical insulator surrounding at least one of said at least two electrodes, said electrode device characterized in that the electrode device comprises; in addition to said at least two electrodes, an earth body of a conducting material arranged to make contact with the skin when said electrode device is used, said earth body surrounding said at least two electrodes to limit said at least two electrodes from picking up a signal from outside of the extent of said earth body, electronics to receive and handle signals from said at least one electrode pair. - View Dependent Claims (35, 36, 37)
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Specification