Sensory Nerves of the Intestines: Role in Control of Pyloric Region of Dogs

  • Gervais Tougas
  • Hans-D. Allescher
  • John Dent
  • Edwin E. Daniel
Part of the Advances in Experimental Medicine and Biology book series (AEMB, volume 298)


The pyloric region, as described by Torgersen (1) in 1942, consists of a circular thickening of the innermost circular muscle layer found at the junction of the stomach and duodenum. Schulze-Delrieu et al. (2) confirmed the presence of this ring in all mammalian species studied, albeit with some variation in size. This was termed the distal pyloric muscle loop. A second thickened muscular ring, the proximal pyloric muscle loop, has been identified in a number of species, and is connected to the distal pyloric muscle loop by a fan-like arrangement of oblique muscle fibres forming a loop over the distal antrum, running from the greater to the lesser curvature. These two circular muscle loops and their connecting fibres meet at a ridge, or torus, located on the lesser curvature aspect of the stomach. Figure 1 illustrates schematically the muscular anatomy of the human pyloric area.


Vagal Stimulation Circular Muscle Myenteric Plexus Cholinergic Nerve Pyloric Sphincter 
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Copyright information

© Springer Science+Business Media New York 1991

Authors and Affiliations

  • Gervais Tougas
    • 1
  • Hans-D. Allescher
    • 1
  • John Dent
    • 2
  • Edwin E. Daniel
    • 1
  1. 1.McMaster University Medical CentreHamiltonCanada
  2. 2.The Royal Adelaide HospitalAdelaideAustralia

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