Patent ID: 7831302

Claim:
A method for non-invasive monitoring of electrical muscular activity which is at least partially due to a non-stationary muscular source, the method incorporating the steps of: a) providing a blind signal separation technique suitable for separating stationary signals, b) placing a plurality of low-noise signal electrodes externally upon a patient's skin for detection of electrical muscular activity, the signal electrodes being localised sufficiently such that: i) their muscular signal contributions simulate a single muscular source to the blind signal separation technique despite at least partial non-stationarity of the muscular source, and ii) the number of sources detected by the blind signal separation technique is not more than the number of signal electrodes; c) using computer apparatus to apply the blind signal separation technique to digital signals derived from signals received from the signal electrodes to separate the muscular source, and d) using a display device to display the separated muscular source to a user.