Threatening an Illusory Limb: An Event-related Potential Study of the Rubber Hand Illusion.

IF 1.3 4区 医学 Q4 BEHAVIORAL SCIENCES
Marcus Heldmann, Gregor Spitta, Tobias Wagner-Altendorf, Thomas F Münte
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引用次数: 0

Abstract

Background: The rubber hand illusion (RHI) is a well-established method for studying body ownership: Given adequate concordance of visual, sensory, and proprioceptive stimuli, the individual experiences a rubber hand as his or her own.

Objective: To study the effects of a threat to the rubber hand.

Methods: We created a typical RHI paradigm but added threatening pain: Both the real hand of an individual and the rubber hand were stroked with a brush, either synchronously (RHI-inducing condition) or asynchronously (control condition), but only the rubber hand was then pricked with a needle to create a threatening pain condition. Event-related potentials (ERPs) were recorded in a group of 23 typically-developed individuals. ERP effects were source-localized using low-resolution electromagnetic tomography.

Results: The individuals consistently reported experience of the RHI during the experiment when the brush strokes were applied synchronously to both the real hand and the rubber hand. ERP analysis revealed that synchronous brush stroking gave rise to higher amplitude of frontal ERPs in the 100-200 ms range than asynchronous brush stroking, which was interpreted as reflecting the RHI. In the threatening pain condition, ERPs showed a greater positivity at frontocentral electrodes, source localized in the supplementary motor area (SMA).

Conclusion: SMA activation could reflect a control mechanism over reflexive motor activity, facilitating a possible threat-related response. Further studies should address ERP effects and the extent of the RHI to standard and threat stimuli in a correlative fashion to further elucidate the functional significance of the neurophysiological findings.

威胁幻肢:橡胶手幻觉的事件相关电位研究。
背景:橡皮手错觉(RHI)是研究身体所有权的一种行之有效的方法:在视觉、感觉和本体感觉刺激充分协调的情况下,个体会将橡皮手体验为自己的手:研究橡胶手受到威胁的影响:我们创建了一个典型的 RHI 范例,但增加了威胁性疼痛:用刷子同步(RHI 诱导条件)或非同步(对照条件)抚摸个体的真手和橡皮手,但随后只用针刺橡皮手,以产生威胁性疼痛条件。对 23 名发育正常的个体进行了事件相关电位(ERP)记录。ERP效应通过低分辨率电磁断层扫描进行源定位:结果:在实验过程中,当笔触同时作用于真实的手和橡皮手时,这些人一致报告了 RHI 体验。ERP分析显示,与异步毛刷抚摸相比,同步毛刷抚摸引起的100-200毫秒范围内的额叶ERP振幅更高,这被解释为反映了RHI。在威胁性疼痛条件下,ERPs 在前中央电极显示出更大的阳性,其源定位在辅助运动区(SMA):结论:SMA 的激活可能反映了对反射性运动活动的控制机制,促进了可能的威胁相关反应。进一步的研究应探讨ERP效应和RHI对标准和威胁刺激的相关程度,以进一步阐明神经生理学研究结果的功能意义。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
2.40
自引率
7.10%
发文量
68
审稿时长
>12 weeks
期刊介绍: Cognitive and Behavioral Neurology (CBN) is a forum for advances in the neurologic understanding and possible treatment of human disorders that affect thinking, learning, memory, communication, and behavior. As an incubator for innovations in these fields, CBN helps transform theory into practice. The journal serves clinical research, patient care, education, and professional advancement. The journal welcomes contributions from neurology, cognitive neuroscience, neuropsychology, neuropsychiatry, and other relevant fields. The editors particularly encourage review articles (including reviews of clinical practice), experimental and observational case reports, instructional articles for interested students and professionals in other fields, and innovative articles that do not fit neatly into any category. Also welcome are therapeutic trials and other experimental and observational studies, brief reports, first-person accounts of neurologic experiences, position papers, hypotheses, opinion papers, commentaries, historical perspectives, and book reviews.
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