Uncovering the relationship between defence and orienting in emotion:: Cardiac reactivity to unpleasant pictures
Uncovering the relationship between defence and orienting in emotion:: Cardiac reactivity to unpleasant pictures
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DOI：
10.1016/j.ijpsycho.2005.10.023
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发表时间：
2006-07-01
影响因子：
3
通讯作者：
Roman, Francisco
中科院分区：
文献类型：
--
作者：
Sanchez-Navarro, Juan Pedro;Martinez-Selva, Jose M.;Roman, Francisco
本研究的目的是研究心血管反应性之间的关系，以强烈的听觉刺激和随后的心脏反应性诱发的情感视觉刺激在55名受试者进行了心脏反应性任务（介绍了强烈的声音刺激），其次是图片观看任务（54图片选自国际情感图片系统）。记录心率（HR）、皮肤电活动和皱眉肌肌电活动。受试者被分为两组-高加速器和低加速器-在心脏反应性任务中获得的第一个心率加速的基础上。图片诱发不同的心脏反应模式，在每个主题组。不愉快的图片促进了较低的初始HR减速和较高的最终加速度在高加速器比在低加速器。这种反应模式在身体受损图片中更为明显。此外，由声刺激促进的第一加速度和对身体损伤图片的HR响应波形之间的关系被发现。这些结果表明，在一个受试者样本中，一个亚组倾向于以较高的HR加速度和交感神经激活对响亮的刺激做出反应，并对不愉快的图片做出防御性反应（如通过较少的初始HR减速和较高的最终HR加速度发现的），而不是表现出定向反应。引发的防御反应的大脑恐惧系统，其中杏仁核是一个关键结构，也进行了讨论。(c)2005 Elsevier B. V.保留所有权利。
This research was aimed at studying the relationship between the cardiovascular reactivity to an intense auditory stimulus and the subsequent cardiac response evoked by affective visual stimuli in fifty-five subjects who underwent a cardiac reactivity task (presentation of an intense acoustic stimulus), followed by a picture viewing task (54 pictures selected from the International Affective Picture System). Heart rate (HR), electrodermal activity and corrugator supercilii electromyographic activity were recorded. Subjects were divided into two groups - high accelerators and low accelerators - on the basis of the first heart rate acceleration obtained in the cardiac reactivity task. Pictures evoked different cardiac response patterns in each subject group. Unpleasant pictures promoted a lower initial HR deceleration and a higher final acceleration in high accelerators than in low accelerators. This pattern of response was more marked with body damage pictures. Moreover, a relationship was found between the first acceleration promoted by the acoustic stimulus and the HR response waveform to the body damage pictures. These results show that, in an unselected sample of subjects, a subgroup tended to respond to loud stimuli with higher HR acceleration and sympathetic activation and to respond defensively to unpleasant pictures (as found by less initial HR deceleration and higher final HR acceleration), rather than manifesting an orienting response. The elicitation of the defence response by a brain fear system, in which the amygdala is a key structure, is also discussed. (c) 2005 Elsevier B.V. All rights reserved.