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ENG timing algorithm

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  • ENG timing algorithm

    Hi all,
    I am proposing to write some software for EMG timing analysis. I have been
    using the Defabio 1987 algorithm which takes the mean of a 50ms resting
    signal and 'on' is defined as mean + 3 Standard deviations of the mean
    resting signal for 25ms.
    However, we have some situations were the muscle turns on in a tonic manner
    then a phasic burst appears, then tonic and back to complete rest when the
    movement is complete. The DeFabio algorithm can not detect the phasic burst
    from the tonic activity.
    I have done a literature search and the Defabio model or versions of it
    seems popular but I want to know if there are any other methods being used
    that I have missed.
    Therefore my questions are;
    1. What algorithms have been used for the above situation and have you
    assessed their validity and realiability?
    2. For normal ie no tonic activity, 'onset' determination, what algorithms
    are in use other than the Defabio one and have their validity and
    realiability been assessed?
    As usual I will post a summary
    Wendy Gilleard E-mail:
    Dept. Biomedical Science Tel: Int +61- (0)2 - 646 65 28
    Faculty of Health Science Fax: Int +61- (0)2 - 646 65 20
    University of Sydney
    Post: P.O. Box 170, Lidcombe, N.S.W. 2141, Australia