Myoelectric activity of the cecum and right ventral colon in female ponies.
Abstract: The myoelectric activity of the cecum and right ventral colon (RVC) was studied in 4 female ponies. Eight, bipolar Ag-AgCl electrodes were sequentially placed on the seromuscular layer of the cecum (6 electrodes) and RVC (2 electrodes), and recordings were begun 14 days after surgery. The myoelectric activity for each pony was recorded during 12, 60-minute recording sessions done during the interdigestive period (3 to 7 hours after the morning feeding). Coordinated series of spike bursts were recognized as independent motility patterns in the cecum and in the RVC. Local haustra-haustra myoelectric activity involving approximately 40 cm of the cecal body (0.45 +/- 0.03 spike bursts/min) were detected. A series of spike bursts started at the cecal apex and progressed to, but stopped at, the caudal cecal base (0.40 +/- 0.03 spike bursts/min). Infrequently, a series of spike bursts started at the apex and progressed to the cranial cecal base (0.09 +/- 0.01 spike bursts/min). More commonly, a series of spike bursts with a conduction velocity of 3.8 +/- 0.07 cm/s, began in the cranial base and progressed orally to the cecal apex (0.46 +/- 0.03 spike bursts/min). Spike bursts conducted aborally (propulsion) beginning at the origin of the RVC (0.05 +/- 0.007 spike bursts/min) and spike bursts conducted orally (retropulsion; 0.15 +/- 0.02 spike bursts/min) were seen independent of cecal myoelectric activity. A progressive series of coordinated spike bursts, which began at the cecal apex, were conducted through the cecolic orifice and continued into the RVC (0.42 +/- 0.02 spike bursts/min), representing the only pattern common to the cecum and RVC.(ABSTRACT TRUNCATED AT 250 WORDS)
Publication Date: 1989-03-01 PubMed ID: 2930024
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- Journal Article
- Research Support
- Non-U.S. Gov't
Summary
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This study investigates and records the myoelectric activity in the cecum and right ventral colon (RVC) of four female ponies. The researchers observed various independent patterns of electrical activity in these digestive organs during nondigestive periods.
Introduction and Methodology
- The study focused on the myoelectric activity of the cecum and right ventral colon (RVC), two parts of the digestive system in ponies.
- Four female ponies were involved in the study.
- Surgeons implanted eight bipolar Ag-AgCl electrodes in each pony, six on the seromuscular layer of the cecum, and two on the RVC.
- These electrodes started recording the myoelectric activity 14 days post-surgery.
- Data collection occurred over 12 sessions, each lasting 60 minutes, taken during the interdigestive period (3 to 7 hours after the morning feeding).
Findings
- Coordinated bursts of electrical activity, or spike bursts, were identified as unique patterns of motility in both the cecum and RVC.
- In the cecum, local haustra-haustra myoelectric activity involving approximately 40 cm of the cecal body was detected.
- Different series of spike bursts were observed, some starting at the cecal apex moving towards the base, others originating from the apex and extending to the cranial cecal base or from the cranial base moving orally to the cecal apex.
- The RVC had two types of spike bursts activity: one moving downwards (aborally) starting at its origin, and one moving upwards (orally). These activities were independent of cecal myoelectric activity.
- The researchers identified one common pattern between the cecum and RVC, a series of coordinated spike bursts starting at the cecal apex, moving through the cecolic orifice, and continuing into the RVC.
Significance of the Research
- This research contributes to our understanding of digestive system function in ponies, particularly the movement of the cecum and the RVC.
- It also highlights the presence of unique independent motility patterns in these organs during the interdigestive period.
- These findings could provide insights into digestive system disorders and contribute to their treatment among pry animals.
Cite This Article
APA
Ross MW, Rutkowski JA, Cullen KK.
(1989).
Myoelectric activity of the cecum and right ventral colon in female ponies.
Am J Vet Res, 50(3), 374-379.
Publication
Researcher Affiliations
- Department of Clinical Studies, University of Pennsylvania, School of Veterinary Medicine, Kennett Square 19348.
MeSH Terms
- Animals
- Cecum / physiology
- Colon / physiology
- Electromyography / veterinary
- Female
- Horses / physiology
Citations
This article has been cited 2 times.- Gough RL, McGovern KF, Bladon BM, Carmichael LA. Caecal dysfunction following standing surgical procedures. Vet Med Sci 2022 Sep;8(5):1930-1935.
- Munsterman AS, Dias Moreira AS, Kottwitz J. Evaluation of the Effects of Detomidine on Equine Myoelectrical Activity Using Electrointestinography. J Vet Emerg Crit Care (San Antonio) 2025 Mar-Apr;35(2):120-130.
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