Effect of Nervous Stimulation on Pyloric Resistance and Configuration

  • K. Schulze-Delrieu
  • B. Wright
  • C. Lu
  • S. S. Shirazi


The two loops formed by the circular muscle within the pyloric segment (Figure 1) differ in their spontaneous and evoked mechanical activity: strips from the left canalis loop (or intermediate gastric sphincter) generate phasic contractions and stimulation of their nerves evokes a contraction. Strips from the right canalis loop (the distal sphincter) generate a high baseline tension and relax on nervous stimulation [1]. The mechanical end-result of nervous stimulation of the entire pyloric segment is controversial: in manometric studies the cat pylorus relaxes [2], whereas in studies of flow across the pylorus stimulation produced a decrease of flow consistent with pyloric contraction [3].


Nervous Stimulation Gastrointestinal Motility Pyloric Sphincter Manometric Study Baseline Flow 
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© MTP Press Limited 1984

Authors and Affiliations

  • K. Schulze-Delrieu
  • B. Wright
  • C. Lu
  • S. S. Shirazi

There are no affiliations available

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