Heart rate variability in the tegu lizard, Salvator merianae, its neuroanatomical basis and role in the assessment of recovery from experimental manipulation.,Comparative Biochemistry and Physiology A: Molecular & Integrative Physiology

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Heart rate variability in the tegu lizard, Salvator merianae, its neuroanatomical basis and role in the assessment of recovery from experimental manipulation.
Comparative Biochemistry and Physiology A: Molecular & Integrative Physiology ( IF 2.1 ) Pub Date : 2019-11-07 , DOI: 10.1016/j.cbpa.2019.110607
Livia M Duran ₁ , Edwin W Taylor ₂ , Pollyana V W Sanches ₁ , André L Cruz ₃ , Driele Tavares ₁ , Marina R Sartori ₄ , Augusto S Abe ₄ , Cleo A C Leite ₁

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Using long-term, remote recordings of heart rate (fH) on fully recovered, undisturbed lizards, we identified several components of heart rate variability (HRV) associated with respiratory sinus arrhythmia (RSA): 1.) A peak in the spectral representation of HRV at the frequency range of ventilation. 2.) These cardiorespiratory interactions were shown to be dependent on the parasympathetic arm of the autonomic nervous system. 3.) Vagal preganglionic neurons are located in discrete groups located in the dorsal motor nucleus of the vagus and also, in a ventro-lateral group, homologous to the nucleus ambiguus of mammals. 4.) Myelinated nerve fibers in the cardiac vagus enabling rapid communication between the central nervous system and the heart. Furthermore, the study of the progressive recovery of fH in tegu following anesthesia and instrumentation revealed that 'resting' levels of mean fH and reestablishment of HRV occurred over different time courses. Accordingly, we suggest that, when an experiment is designed to study a physiological variable reliant on autonomic modulation at its normal, resting level, then postsurgical reestablishment of HRV should be considered as the index of full recovery, rather than mean fH.

中文翻译：

tegu蜥蜴，Salvator merianae的心率变异性，其神经解剖学基础和在评估实验操作的恢复中的作用。

通过对完全康复，不受干扰的蜥蜴进行长期，远程的心率（fH）记录，我们确定了与呼吸窦性心律不齐（RSA）相关的心率变异性（HRV）的几个组成部分：1.） HRV在通气频率范围内。2.）这些心肺相互作用被证明依赖于自主神经系统的副交感神经。3.）迷走神经节前神经元位于迷走神经背运动核中的离散组中，并且在腹外侧组中与哺乳动物的歧义核同源。4.）心脏迷走神经中的有髓神经纤维使中枢神经系统和心脏之间可以快速通讯。此外，麻醉和使用器械后，tegu的fH逐渐恢复的研究表明，平均fH的“静止”水平和HRV的重建发生在不同的时间过程中。因此，我们建议，当设计一个实验来研究依赖于其正常，静息水平的自主神经调节的生理变量时，HRV的术后重建应被视为完全恢复的指标，而不是平均fH。

更新日期：2019-11-07

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