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Relation of intrinsic heart rate and autonomic nervous tone to resting heart rate in the young and the adult of various domestic animals.
Abstract: Intrinsic heart rate (IHR) and autonomic nervous tone (ANT) were measured using the young and the adult of horses, cows, pigs, goats and chickens in order to elucidate species differences in a decrease of resting heart rate (RHR) with growth or age. The IHR and ANT were estimated from the changes in heart rate after the administration of atropine and/or propranolol. The IHR in all species decreased progressively with an increase in body weight from young to adult, and moreover the ANT altered toward the direction of parasympathetic predominance by a decrease in sympathetic tone and/or an increase in parasympathetic tone. The decrease of the RHR with growth resulted from a decrease in the IHR primarily and from a parasympathetic predominance in the ANT secondarily. A considerable species difference existed in the alteration of the ANT.
Publication Date: 1989-02-01 PubMed ID: 2927036DOI: 10.1292/jvms1939.51.29Google Scholar: Lookup The Equine Research Bank provides access to a large database of publicly available scientific literature. Inclusion in the Research Bank does not imply endorsement of study methods or findings by Mad Barn.
- Comparative Study
- Journal Article
- Research Support
- Non-U.S. Gov't
Summary
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This study explores the connection between intrinsic heart rate (IHR) and autonomic nervous tone (ANT) to the resting heart rate (RHR) in a variety of domestic animals including horses, cows, pigs, goats, and chickens. It finds that both IHR and ANT vary based on species, weight, and age, with marked differences in the way each species adjust their autonomic nervous tone.
Measurement of IHR and ANT
- The researchers estimated the intrinsic heart rate and the autonomic nervous tone based on changes in the heart rate after the administration of specific drugs including atropine and propranolol.
- The study was conducted using both young and adult animals of different species – horses, cows, pigs, goats, and chickens – to provide comprehensive data across a range of domestic species.
IHR and ANT Changes with Age and Growth
- The study found that the IHR decreased progressively as the animals grew larger from young to adult.
- The ANT, on the other hand, shifted towards parasympathetic predominance, a state typically associated with relaxation and digestion.
- This alteration was brought about by a decrease in sympathetic tone (associated with the body’s “fight or flight” response) and/or an increase in parasympathetic tone.
Relationship between RHR, IHR and ANT
- As the IHR decreased as the animal grew, so too did the resting heart rate.
- However, it was also found that a shift towards parasympathetic predominance in the ANT also contributed to the decrease in resting heart rate.
- Therefore, both a decrease in IHR and an increase in parasympathetic predominance in the ANT can result in a lower resting heart rate.
Species Differences in ANT Alteration
- Notably, the study found a considerable difference between species in terms of how their ANT changed with growth or age.
- This suggests that the regulatory mechanisms of the autonomic nervous system may differ significantly between species.
Cite This Article
APA
Matsui K, Sugano S.
(1989).
Relation of intrinsic heart rate and autonomic nervous tone to resting heart rate in the young and the adult of various domestic animals.
Nihon Juigaku Zasshi, 51(1), 29-34.
https://doi.org/10.1292/jvms1939.51.29 Publication
Researcher Affiliations
MeSH Terms
- Aging / physiology
- Animals
- Animals, Domestic / physiology
- Autonomic Nervous System / physiology
- Cattle
- Chickens
- Goats
- Heart Rate
- Horses
- Swine
Citations
This article has been cited 2 times.- Hiraga A, Sugano S. History of research in Japan on electrocardiography in the racehorse. J Equine Sci 2015;26(1):1-13.
- Yamamoto M, Kato A, Ropert-Coudert Y, Kuwahara M, Hayama S, Naito Y. Evidence of dominant parasympathetic nervous activity of great cormorants (Phalacrocorax carbo). J Comp Physiol A Neuroethol Sens Neural Behav Physiol 2009 Apr;195(4):365-73.
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