Equine pelvic flexure myoelectric activity during fed and fasted states.
Abstract: The pelvic flexure is the midpoint of the equine large colon that marks the junction of dorsal and ventral components. Previous studies of intraluminal pressure in this region indicate that it could be an important motility control center. The present study was undertaken to expand our knowledge of normal myoelectric activity around the pelvic flexure region. Eight bipolar silver wire electrodes were surgically fixed at 5-cm intervals to the colonic serosa of five adult horses, starting 30 cm oral to the pelvic flexure on the left ventral colon and ending 15 cm aboral to the pelvic flexure on the left dorsal colon (LDC). Recordings of myoelectric activity were done after feed had been withheld for 20 h or when the horses had been allowed to eat hay up to the time of the recording session. The activity was recorded on a polygraph, digitized, processed through a commercial graphics software package, and stored on magnetic tape for later analysis. Action potential activity was basically separated into long spike bursts (LSB) that were > or = 4 s duration and short spike bursts (SSB) that were < 4 s duration and quantified by a software program developed exclusively for the equine large intestine.(ABSTRACT TRUNCATED AT 250 WORDS)
Publication Date: 1995-08-01 PubMed ID: 7653567DOI: 10.1152/ajpgi.1995.269.2.G262Google Scholar: Lookup
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- Journal Article
- Research Support
- Non-U.S. Gov't
Summary
This research summary has been generated with artificial intelligence and may contain errors and omissions. Refer to the original study to confirm details provided. Submit correction.
The research article investigates the electrical activity of a specific area in a horse’s digestive tract, known as the pelvic flexure, during periods of feeding and fasting. Measurements for this experiment were gathered using surgically implanted electrodes and were analyzed using specialized software.
Research Background
- The research focuses on the pelvic flexure, a part of the equine large colon. This region is regarded as a potentially crucial control center for digestive motility based on previous studies about the intraluminal pressure in this area.
- The objective was to enrich the understanding of the normal myoelectric activity: electrical changes associated with muscle contractions, around the pelvic flexure region.
Research Methodology
- The researchers used eight bipolar silver wire electrodes for the experiment. These were surgically secured to the outer layer of the large intestine (colonic serosa) of five adult horses. The positioning began 30 cm before the pelvic flexure on the left ventral colon and ended 15 cm after the pelvic flexure on the left dorsal colon.
- Recordings were taken after the horses had not been fed for 20 hours, or when they had been allowed to eat hay up to the time of the recording session.
- The data was recorded on a polygraph (instrument for recording changes in physiological characteristics), digitized, processed through a commercial graphics software package, and stored on magnetic tape for further analysis.
Result Analysis
- The recorded myoelectric activities were segregated into two types: Long Spike Bursts (LSB) lasting more than or equal to 4 seconds, and Short Spike Bursts (SSB) lasting less than 4 seconds.
- A specialized software program exclusively developed for analyzing data related to the equine large intestine was used for quantifying these signals.
However, the abstract is truncated at 250 words, and a fuller understanding would require access to the complete research paper.
Cite This Article
APA
Merritt AM, Panzer RB, Lester GD, Burrow JA.
(1995).
Equine pelvic flexure myoelectric activity during fed and fasted states.
Am J Physiol, 269(2 Pt 1), G262-G268.
https://doi.org/10.1152/ajpgi.1995.269.2.G262 Publication
Researcher Affiliations
- Department of Large Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville 32610-0136, USA.
MeSH Terms
- Animals
- Colon / physiology
- Eating
- Electrophysiology
- Fasting
- Female
- Gastrointestinal Motility / physiology
- Horses
- Male
- Myoelectric Complex, Migrating
- Pressure
Citations
This article has been cited 3 times.- Williams S, Horner J, Orton E, Green M, McMullen S, Mobasheri A, Freeman SL. Water intake, faecal output and intestinal motility in horses moved from pasture to a stabled management regime with controlled exercise. Equine Vet J 2015 Jan;47(1):96-100.
- Koenig J, Cote N. Equine gastrointestinal motility--ileus and pharmacological modification. Can Vet J 2006 Jun;47(6):551-9.
- Mitchell CF, Malone ED, Sage AM, Niksich K. Evaluation of gastrointestinal activity patterns in healthy horses using B mode and Doppler ultrasonography. Can Vet J 2005 Feb;46(2):134-40.
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