Methods for searching reference points of cyclic and non-stationary signals

The article is devoted to the problem of locating the motor areas of the cerebral cortex of human non-invasive methods. Magnetoencephalography is one of such methods. Associative processing method is used to determine the boundaries of functional areas of the brain where magnitoentsefalogrammy (MEG signals) are considered in conjunction with other signals. In particular, myogram - human muscular activity signals, used for locating the site of the brain responsible for movement. The definition of reference points is the highest difficulty, on those points are averaged MEG-signal values. Material, represented in this article, describes a searching method of superweak and non-stationary signals of reference point. Search method based on idea of signal observing with two separated but adjacent windows called. Reference point, located on the edge of rest and motion segments, is determined by difference in signal conducting in adjacent windows.