Evidence map›Paper›PMID 17952441›Full record

ArticleJournal of comparative physiology. B, Biochemical, systemic, and environmental physiology2008

High-definition spatiotemporal mapping of contractile activity in the isolated proximal colon of the rabbit.

Roger G Lentle, Patrick W M Janssen, Patchana Asvarujanon, Paul Chambers, Kevin J Stafford, Yacine Hemar

Abstract read
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In one paragraph

Article in Journal of comparative physiology. B, Biochemical, systemic, and environmental physiology, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed
1.4field-weighted citation impact, top 19% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

23 citing papers in PubMed, 64 citations in OpenAlex.

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  14. A review of mixing and propulsion of chyme in the small intestine: fresh insights from new methods.Journal of comparative physiology. B, Biochemical, systemic, and environmental physiology · 2015
    Review
  15. Article
  16. Review
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  19. Article
  20. Spatiotemporal mapping of ex vivo motility in the caecum of the rabbit.Journal of comparative physiology. B, Biochemical, systemic, and environmental physiology · 2012
    Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors at 1 institution in 1 country.

Roger G LentleInstitute of Food, Nutrition and Human Health, Massey University, Private Bag 11222, Palmerston North, New Zealand. r.g.lentle@massey.ac.nz
Patrick W M Janssen
Patchana Asvarujanon
Paul Chambers
Kevin J Stafford
Yacine Hemar
Massey University · NZ

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Four types of contractile activity were identified and characterised in the isolated triple haustrated proximal colon of the rabbit using high-definition spatiotemporal mapping techniques. Mass peristalses were hexamethonium-sensitive deep circular contractions with associated taenial longitudinal contractile activity that occurred irregularly and propagated rapidly aborad, preceded by a zone of local lumen distension. They were sufficiently sustained for each event to occupy the length of the isolated colonic segment and the contraction persisted longer orally than aborally, the difference being more pronounced when lumen contents were viscous. Haustra were bounded by deep even-spaced ring contractions that progressed slowly aborad (haustral progression). Haustral formation and progression were hexamethonium-sensitive and coordinated across intertaenial domains. Ripples were hexamethonium-resistant phasic circular contractions that propagated predominantly orad at varying rates. In the presence of haustra, they were uncoordinated across intertaenial domains but were more coordinated when haustra were absent. Fast phasic contractions were relatively shallow hexamethonium-resistant contractions that propagated rapidly in a predominantly aborad direction. Fast phasic circular contractions were accompanied by taenial longitudinal muscle contractions which increased in amplitude prior to a mass peristaltic event and following the administration of hexamethonium. On the basis of the concurrence and interaction of these contractile activities, we hypothesise that dual pacemakers are present with fast phasic contractions being modulated by the interstitial cells of Cajal in the Auerbach's plexus (ICC-MY) while ripples are due to the submucosal ICC (ICC-SM). Further, that ICC-SM mediate the enteric motor neurons that generate haustral progression, while the intramuscular ICC (ICC-IM) mediate mass peristalsis. The orad movement of watery fluid was possibly due to ripples in the absence of haustra.

Indexed as

Anesthetics, LocalAnimalsColonFemaleGanglionic BlockersGastrointestinal MotilityGastrointestinal TractHexamethoniumMaleMotor NeuronsMuscle ContractionMuscle, SmoothPeristalsisRabbitsTetrodotoxinTime FactorsAnesthetics, LocalGanglionic BlockersHexamethoniumTetrodotoxin

Identifiers

PMID17952441
OpenAlexW2049055003

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.