Quantitative motor unit action potential analysis in 2 paraspinal neck muscles in adult Royal Dutch Sport horses.
Abstract: Reference values for quantitative electromyography (QEMG) in neck muscles of Royal Dutch Sport horses are lacking. Objective: Determine normative data on quantitative motor unit action potential (QMUP) analysis of serratus ventralis cervicis (SV) and brachiocephalicus (BC) muscle. Methods: Seven adult normal horses (mean age 9.5 standard deviation [SD] ± 2.3 years, mean height 1.64 SD ± 4.5 cm, and mean rectal temperature 37.6 SD ± 0.3°C). Methods: An observational study on QMUP analysis in 6 segments of each muscle was performed with commercial electromyography equipment. Measurements were made according to formerly published methods. Natural logarithm transformed data were tested with ANOVA and posthoc testing according to Bonferroni. Results: Mean duration, amplitude, phases, turns, area, and size index (SI) did not differ significantly among the 6 segments in each muscle. Mean amplitude, number of phases, and SI were significantly (P < .002) higher in SV than BC, 520 versus 448 μV, 3.0 versus 2.8 μV, and 0.48 versus 0.30 μV, respectively. In SV 95% confidence intervals (CI) for amplitude, duration, number of phases, turns, polyphasia area, and SI were 488-551 μV, 4.3-4.6 ms, 2.9-3.0, 2.4-2.6, 7-12%, 382-448, and 0.26-0.70, respectively; in BC this was 412-483 μV, 4.3-4.7 ms, 2.7-2.8, 2.4-2.6, 4-7%, 393-469, and 0.27-0.34, respectively. Maximal voluntary activity expressed by turns/second did not differ significantly between SV and BC with a 95% CI of 132-173 and 137-198, respectively. Conclusions: The establishment of normative data makes objective QEMG of paraspinal muscles in horses suspected of cervical neurogenic disorders possible. Differences between muscles should be taken into account.
Copyright © 2011 by the American College of Veterinary Internal Medicine.
Publication Date: 2011-04-12 PubMed ID: 21488965DOI: 10.1111/j.1939-1676.2011.0724.xGoogle Scholar: Lookup
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Summary
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The research article discusses the establishment of normative data for quantitative motor unit action potential (QMUP) analysis of two neck muscles in adult Royal Dutch Sport horses. This data is key for assessing paraspinal muscles in horses suspected of having cervical neurogenic disorders.
Objective and Methods
- The aim of the study was to determine reference levels for quantitative electromyography (QEMG) of the serratus ventralis cervicis (SV) and brachiocephalicus (BC) muscles in Royal Dutch sport horses, as there were no previous values available.
- The research was an observational study conducted on seven healthy adult horses with an average age of 9.5 years and mean height of 1.64 cm. Their body temperatures were also monitored.
- The QMUP analysis was performed using a commercial electromyography device on six different segments of each muscle. The measurements were made following previously published methodologies.
- The collected data were transformed using the natural logarithm and then tested using ANOVA and subsequent Bonferroni post-hoc tests.
Results and Findings
- No significant differences were found in the duration, amplitude, phases, turns, area, and size index (SI) among the six segments of each muscle.
- However, mean amplitude, number of phases, and SI were significantly higher (P < .002) in the SV muscle than the BC muscle. This indicated a variation in the muscular and neural characteristics between the two muscles.
- Proposed reference ranges for different QMUP parameters in both muscles were provided, considering 95% confidence intervals. These ranges would be useful for future diagnoses in assessing the state of horse’s neck muscles.
- Finally, there was no significant difference in maximal voluntary activity between the two muscles, as expressed by turns per second.
Conclusion and Importance of Findings
- The study has successfully established normative data for QMUP analysis of the SV and BC muscles in adult Royal Dutch Sport horses.
- This data is crucial for obtaining objective electromyographic assessments of the paraspinal neck muscles in horses that are suspected of having cervical neurogenic disorders.
- The noted differences between muscles highlight the requirement to consider individual muscle properties during diagnostic evaluations.
Cite This Article
APA
Wijnberg ID, Graubner C, Auriemma E, van de Belt AJ, Gerber V.
(2011).
Quantitative motor unit action potential analysis in 2 paraspinal neck muscles in adult Royal Dutch Sport horses.
J Vet Intern Med, 25(3), 592-597.
https://doi.org/10.1111/j.1939-1676.2011.0724.x Publication
Researcher Affiliations
- Department of Equine Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands. i.d.wijnberg@uu.nl
MeSH Terms
- Action Potentials / physiology
- Analysis of Variance
- Animals
- Electromyography / veterinary
- Horses / physiology
- Motor Neurons / physiology
- Neck Muscles / physiology
- Recruitment, Neurophysiological / physiology
- Reference Values
Citations
This article has been cited 1 times.- Zsoldos RR, Krüger B, Licka TF. From maturity to old age: tasks of daily life require a different muscle use in horses. Comp Exerc Physiol 2014;10(2):75-88.
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