Seki Nozomi, Tochinai Ryota, Sekizawa Shin-Ichi, Márquez Martín Alejandro, Fukuda Kentaro, Ohmura Hajime, Kuwahara Masayoshi
Department of Veterinary Pathophysiology and Animal Health, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo 113-8657, Japan.
Clinical Veterinary Medicine Division, Equine Research Institute, Japan Racing Association, Tochigi 329-0412, Japan.
J Equine Sci. 2023 Jun;34(2):55-59. doi: 10.1294/jes.34.55. Epub 2023 Jun 12.
The Criollo is an Argentine horse breed with a calm temperament. Although its temperament is considered to be related to its neurophysiological characteristics, the details of this are unknown. Therefore, we analyzed the heart rate variability in Criollos as a preliminary study to deepen the neurophysiological understanding of their autonomic function. Electrocardiograms were recorded from Criollos and Thoroughbreds, and the power spectrum of heart rate variability was analyzed. Compared with Thoroughbreds, Criollos showed (i) a significantly higher high-frequency component, which is an index of parasympathetic nerve activity, and (ii) tendency toward a lower ratio of low- to high-frequency power, which is an index of the autonomic balance. These results revealed that parasympathetic nerves might be more active in Criollos compared with Thoroughbreds.
克里奥罗马是一种性情温顺的阿根廷马品种。尽管其性情被认为与其神经生理特征有关，但具体细节尚不清楚。因此，作为一项初步研究，我们分析了克里奥罗马的心率变异性，以加深对其自主功能的神经生理学理解。记录了克里奥罗马和纯种马的心电图，并分析了心率变异性的功率谱。与纯种马相比，克里奥罗马表现出：（i）作为副交感神经活动指标的高频成分显著更高；（ii）作为自主平衡指标的低频与高频功率比值有降低的趋势。这些结果表明，与纯种马相比，克里奥罗马的副交感神经可能更活跃。
