Chapter

Gastrointestinal Motility: Electrogastrography

Robert M. Stern, William J. Ray and Karen S. Quigley

in Psychophysiological Recording

Second edition

Published in print December 2000 | ISBN: 9780195113594
Published online March 2012 | e-ISBN: 9780199846962 | DOI: http://dx.doi.org/10.1093/acprof:oso/9780195113594.003.0011
Gastrointestinal Motility: Electrogastrography

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The psychophysiology of the gastrointestinal system is a relatively unexplored area, in part due to the instrumentation and measurement problems of obtaining data from far inside this constantly changing many-meter-long system. Nevertheless, a number of studies of motor activity have been conducted, particularly in the more easily accessible two ends of the gastrointestinal tract, the esophagus and rectum, and also in the stomach. This chapter focuses on the motor activity of the stomach as measured with the noninvasive method of electrogastrography, a technique which records electrogastrograms (EGGs). EGGs reflect gastric myoelectrical activity as it is recorded from the abdominal surface with cutaneous electrodes. The physiological basis of EGGs is discussed, along with the psychophysiological recording procedure, typical recordings, common problems associated with EGGs, and analysis and quantification.

Keywords: psychophysiology; gastrointestinal tract; stomach; motor activity; electrogastrography; electrodes; psychophysiological recording

Chapter.  7131 words.  Illustrated.

Subjects: Psychology

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