Reyes del Paso G A, Godoy J, Vila J
Departamento de Personalidad, Evaluación y Tratamiento Psicológico, Facultad de Filosofía y Letras, University of Granada, Spain.
Biol Psychol. 1993 Jan;35(1):17-35. doi: 10.1016/0301-0511(93)90089-q.
The respiratory sinus arrhythmia (RSA) is being used by psychophysiologists as an index of parasympathetic cardiac control mainly in tasks within a tonic response paradigm. In procedures which engender phasic responses the belief exists that the RSA could be contaminated by slower nonrhythmic trends in the data. In the present paper two experiments are reported. The first experiment valuates, through beta-adrenergic blocking, the validity of the RSA as an index of phasic changes in parasympathetic cardiac control during phasic changes in sympathetic activation: the cardiac defense response (CDR) to intense auditory stimulation. The second experiment examines the RSA response pattern associated with the CDR. The results of the first experiment, that the RSA response pattern is not significantly influenced by the beta-adrenergic block, suggest that RSA may index phasic changes in parasympathetic cardiac control during phasic response procedures such as those which elicit the CDR. The results of the second study indicate that the CDR is associated with a pattern of changes in RSA made up of four components--reduction, increase, reduction and increase--which run parallel, but in opposite direction, to the heart rate changes. The results of both studies are consistent with a parasympathetic mediation of the first two components of the CDR and a sympathetic-parasympathetic interactive mediation of the last two components.
呼吸性窦性心律不齐（RSA）主要在紧张性反应范式下的任务中，被心理生理学家用作副交感神经心脏控制的指标。在产生阶段性反应的程序中，人们认为RSA可能会被数据中较慢的非节律性趋势所干扰。本文报告了两个实验。第一个实验通过β-肾上腺素能阻断，评估RSA作为交感神经激活阶段性变化期间副交感神经心脏控制阶段性变化指标的有效性：对强烈听觉刺激的心脏防御反应（CDR）。第二个实验研究与CDR相关的RSA反应模式。第一个实验的结果表明，RSA反应模式不受β-肾上腺素能阻断的显著影响，这表明RSA可能是阶段性反应程序（如引发CDR的程序）中副交感神经心脏控制阶段性变化的指标。第二项研究的结果表明，CDR与RSA的一种变化模式相关，该模式由四个部分组成——降低、升高、降低和升高——与心率变化平行，但方向相反。两项研究的结果均与CDR前两个部分的副交感神经介导以及后两个部分的交感-副交感神经交互介导一致。
