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Gastric Myoelectric Activity

The normal stomach generates a myoelectric signal (EGG) that oscillates with a period of three cycles per minute. The EGG can be measured noninvasively by using the EGG100C amplifier and standard leads with disposable electrodes. After the data is recorded, the signal median frequency and power spectral density can be determined using AcqKnowledge. This type of signal processing is useful for evaluating abnormal gastric rhythms, such as tachygastria or bradygastria. It’s also possible to evaluate the EGG signal using the phase-space techniques associated with non-linear dynamics. Plotting EGG rate against a delayed version of itself in X/Y mode can point to patterns not otherwise evident in the time series data.

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