Advertisement

Digestive Diseases and Sciences

, Volume 25, Issue 3, pp 179–187 | Cite as

What is measured in electrogastrography?

  • A. J. P. M. Smout
  • E. J. Van Der Schee
  • J. L. Grashuis
Original Articles

Abstract

The object of this study was to elucidate what is actually measured in electrogastrography. Comparison of gastric signals simultaneously recorded from serosal and cutaneous electrodes in the conscious dog led to the following findings: 1. In the absence of phasic contractile activity and electrical response activity (ERA), the cutaneous recordings contained a frequency corresponding to the fundamental frequency of the electrical control activity (ECA) of the stomach (about 0.08 Hz). 2. Tachygastrias gave rise to cutaneous signals containing the tachygastric frequency (about 0.25 Hz). 3. The amplitude of the electrogastrogram increased when ERA occurred. It is concluded that both ECA and ERA are reflected in the electrogastrogram. A model is proposed that describes the electrogastrogram as the result of field potentials generated by depolarization and repolarization dipoles.

Keywords

Public Health Control Activity Fundamental Frequency Field Potential Response Activity 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Alvarez WC: The electrogastrogram and what it shows. J Am Med Assoc 78:1116–1119, 1922Google Scholar
  2. 2.
    Davis RC, Garafolo L, Gault FP: An exploration of abdominal potentials. J Comp Physiol Psychol 52:519–523, 1957Google Scholar
  3. 3.
    Nelsen TS, Kohatsu S: Clinical electrogastrography and its relation to gastric surgery. Am J Surg 116:215–221, 1968Google Scholar
  4. 4.
    Martin A, Moline J, Thouvenot J: Potentiels électriques dérivés à la surface de I'abdomen en relation avec I'activité antropylorique chez I'animal et chez I'homme. CR Soc Biol (Paris) 163:1423–1425 1969Google Scholar
  5. 5.
    Drieux C, Garnier D, Martin A, Moline J: Corrélation entre I'activité électrique de I'antre gastrique et I'électrogastroentérogramme du Cobaye. J Physiol (Paris) 73:A20, 1977Google Scholar
  6. 6.
    Tonkovic S, Thouvenot J, Penaud J: Electrosplanchnographical exploration of the digestive tract diseases. Digest 11th International Conference on Medical and Biological Engineering, Ottawa, 1976Google Scholar
  7. 7.
    Brown BH, Smallwood RH, Duthie HL, Stoddard CJ: Intestinal smooth muscle electrical potentials recorded from surface electrodes. Med Biol Eng 13:97–103, 1975Google Scholar
  8. 8.
    Smallwood RH: Gastrointestinal electrical activity from surface electrodes. Thesis, Sheffield, 1976Google Scholar
  9. 9.
    Thouvenot J, Penaud J, Morelle O: Sur les phénomènes électrophysiologiques des viscères: leur traduction à la surface cutanée. J Physiol (Paris) 65:A170–171, 1972Google Scholar
  10. 10.
    Besseling NC, van Maaren DCh, Kingma YJ: An implantable biotelemetry transmitter for six differential signals. Med Biol Eng 14:660–664, 1976Google Scholar
  11. 11.
    Code CF, Marlett JA: The interdigestive myoelectric complex of the stomach and small bowel of dogs. J Physiol (London) 246:289–309, 1975Google Scholar
  12. 12.
    Code CF, Marlett JA: Canine tachygastria. Mayo Clin Proc 49:325–332, 1974Google Scholar
  13. 13.
    Daniel EE: The electical and contractile activity of the pyloric region in dogs and the effects of drugs. Gastroenterology 49:403–418, 1965Google Scholar
  14. 14.
    Geddes LA: Electrodes and the Measurement of Bioelectric Events. New York: Wiley-Interscience, 1972Google Scholar
  15. 15.
    Papasova MP, Nagai T, Prosser CL: Two-component slow waves in smooth muscle of cat stomach. Am J Physiol 214:695–702, 1968Google Scholar
  16. 16.
    Szurszewski JH: Mechanism of action of pentagastrin and acetylcholine on the longitudinal muscle of the canine antrum. J Physiol (London) 252:335–361, 1975Google Scholar
  17. 17.
    Tiemann F, Reichertz P: Über das intestinale Elektrogramm (EIG) and seine Bedeutung für die Klinik. Med Klin 14:654–668, 1959Google Scholar
  18. 18.
    Sobakin MA, Smirnov IP, Mishin LN: Electrogastrography. IRE Trans Bio-Med Electron 9:129–132, 1962Google Scholar
  19. 19.
    Martin A, Moline J, Murat J: Apport de I'électrosplanchnographie (ESG) au diagnostic pré-opératoire d'une ulcération gastrique. Presse Med 28:1277–1278, 1971Google Scholar
  20. 20.
    Martin A, Thillier JL, Moline J: Effets de la section du vague sur la motricité gastrique chez I'homme. Etude électrogastroentérographique. J Physiol (Paris) 65:A145, 1972Google Scholar

Copyright information

© Digestive Disease System. Inc 1990

Authors and Affiliations

  • A. J. P. M. Smout
    • 1
  • E. J. Van Der Schee
    • 1
  • J. L. Grashuis
    • 1
  1. 1.Department of Medical Technology, Faculty of MedicineErasmus UniversityRotterdamThe Netherlands

Personalised recommendations