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Spatiotemporal Mapping of Motility in Ex Vivo Preparations of the Intestines
Published on: January 28, 2016
Modulation of gut perception in humans by spatial summation phenomena
J Serra1, F Azpiroz, J R Malagelada
1Digestive System Research Unit, Hospital General Vall d'Hebron, Autonomous University of Barcelona, Spain.
The Journal of Physiology
|March 10, 1998
Summary
Intestinal perception increases with the length of the gut stimulated. Simultaneous stimuli, regardless of distance, enhance this perception, indicating spatial summation in the gut.
Area of Science:
- Gastroenterology
- Neuroscience
- Human Physiology
Background:
- Spatial summation of intestinal stimuli enhances perception.
- Understanding factors influencing gut perception is crucial for managing visceral pain.
Purpose of the Study:
- To investigate if intestinal perception in humans depends on the length of the stimulated gut segment.
- To determine the effect of the distance between stimuli on intestinal perception.
Main Methods:
- Comparing perception of isobaric intestinal distensions over 3 cm versus 36 cm segments using barostats.
- Assessing perception of simultaneous intestinal distensions applied by balloons placed at varying distances (3, 12, 48 cm apart).
Main Results:
- Distending a 36 cm intestinal segment caused significantly greater perception than a 3 cm segment.
- Simultaneous stimuli increased perception, with similar summation effects observed regardless of whether the stimuli were adjacent or distant.
Conclusions:
- Intestinal distension perception is influenced by the extent of the stimulated field.
- Spatial summation of intestinal stimuli occurs irrespective of the distance between stimulation sites.
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