Surface Gastrograms as Measures of Gastric Motility

Electrical activity of the stomach can be measured using surface electrodes. The cutaneous recording of gastric electrical activity is called the electrogastrogram (EGG). Gastric electrical dysrhythmic events associated with abnormal conditions of the stomach may be detected from the EGG. An adaptive spectral analysis method which is based on autoregressive moving average modeling has previously been developed. The aim of this paper is to demonstrate the ability of the previous method in detecting gastric dysrhythmic events from the EGG. A series of bench tests stimulating typical problems with the analysis of nonstationary electric potentials was conducted. The application of the adaptive spectral analysis method to dysrhythmic events and rhythmic variations of the gastric slow wave is presented in this paper. The adaptive spectral analysis approach provides several advantages: narrow frequency peaks permitting more precise frequency identification, determination of changes in frequency components at any time point, and enhanced interpretation of cutaneous EGG recordings.

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Electrogastrography: Current Issues in Validation and Methodology

Stern

Koch

Stewart

et al. 1987

Psychophysiology

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In this review we present some current applications of electrogastrography, relationships between the electrogastrogram (EGG) and electrical and contractile activity of the stomach, EGG recording technique, and the current status of electrogastrography. The authors conclude the following: (1) The 3 cpm frequency of the EGG reflects the frequency of pacesetter potentials occurring at the serosal and mucosal surfaces of the stomach. (2) An increase in the contractile activity of the corpnsantrum is associated with an increase in the amplitude of the 3 cpm EGG signal. (3) Tachygastria (5–9 cpm waves) recorded with the EGG reflects identical frequencies recorded with mucosal electrodes from the gastric antrum. (4) Low frequency components (approximately 1 cpm) appear in the EGG signal but their physiological significance is unknown at this time.

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Surface Gastrograms as Measures of Gastric Motility

Cited by 6 publications

References 69 publications

Psychophysiological Indices of the Feeding Response in Anorexia Nervosa Patients

Psychophysiological Indices of the Feeding Response in Anorexia Nervosa Patients

Spectral analysis of episodic rhythmic variations in the cutaneous electrogastrogram

Electrogastrography: Current Issues in Validation and Methodology

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