The American Journal of Digestive Diseases

, Volume 17, Issue 4, pp 299–310 | Cite as

Simulation of the electric-control activity of the stomach by an array of relaxation oscillators

  • S. K. Sarna
  • E. E. Daniel
  • Y. J. Kingma


An array of bidirectionally coupled relaxation oscillators is proposed as a model of gastric electric-control activity. The characteristics of relaxation oscillators simulating control activity, such as intact and intrinsic frequency gradients and phase-lag patterns, were studied in anesthetized dogs. A marked intrinsic frequency gradient was found along the axis of the stomach, and a slight intrinsic frequency gradient around the circumference. The phase lag/cm decreased distally from the body of the stomach to the antrum. The model showed all these characteristics. Each oscillator in the array was represented by a system of two first-order nonlinear differential equations. The model was programmed on analog and hybrid computers.


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Copyright information

© Harper & Row, Publishers 1972

Authors and Affiliations

  • S. K. Sarna
    • 1
  • E. E. Daniel
    • 1
  • Y. J. Kingma
    • 1
  1. 1.From the Departments of Electrical Engineering and PharmacologyThe University of AlbertaEdmontonCanada

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