通过激活伤害性C纤维和Aδ纤维引发橡胶手错觉。

Eliciting the rubber hand illusion by the activation of nociceptive C and Aδ fibers.

作者信息

Coppi Sara, Jensen Karin B, Ehrsson H Henrik

机构信息

Departments of Neuroscience and.

Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden.

出版信息

Pain. 2024 Oct 1;165(10):2240-2256. doi: 10.1097/j.pain.0000000000003245. Epub 2024 May 24.

Abstract

The coherent perceptual experience of one's own body depends on the processing and integration of signals from multiple sensory modalities, including vision, touch, and proprioception. Although nociception provides critical information about damage to the tissues of one's body, little is known about how nociception contributes to own-body perception. A classic experimental approach to investigate the perceptual and neural mechanisms involved in the multisensory experience of one's own body is the rubber hand illusion (RHI). During the RHI, people experience a rubber hand as part of their own body (sense of body ownership) caused by synchronized stroking of the rubber hand in the participant's view and the hidden participant's real hand. We examined whether the RHI can be elicited by visual and "pure" nociceptive stimulation, ie, without tactile costimulation, and if so, whether it follows the basic perceptual rules of the illusion. In 6 separate experiments involving a total of 180 healthy participants, we used a Nd:YAP laser stimulator to specifically target C and Aδ fibers in the skin and compared the illusion condition (congruent visuonociceptive stimulation) to control conditions of incongruent visuonociceptive, incongruent visuoproprioceptive, and no nociceptive stimulation. The illusion was quantified through direct (questionnaire) and indirect (proprioceptive drift) behavioral measures. We found that a nociceptive rubber hand illusion (N-RHI) could be elicited and that depended on the spatiotemporal congruence of visuonociceptive signals, consistent with basic principles of multisensory integration. Our results suggest that nociceptive information shapes multisensory bodily awareness and contributes to the sense of body ownership.

摘要

对自身身体连贯的感知体验取决于来自多种感觉模态(包括视觉、触觉和本体感觉)信号的处理与整合。尽管伤害感受提供了有关身体组织损伤的关键信息,但关于伤害感受如何有助于自身身体感知却知之甚少。一种用于研究自身身体多感觉体验所涉及的感知和神经机制的经典实验方法是橡皮手错觉(RHI)。在橡皮手错觉实验中,由于在参与者视野中同步抚摸橡皮手以及隐藏起来的参与者的真实手,人们会将橡皮手体验为自身身体的一部分(身体所有权感)。我们研究了橡皮手错觉是否能由视觉和“纯粹”的伤害性刺激引发,即无需触觉共刺激,如果可以的话,它是否遵循错觉的基本感知规则。在总共涉及180名健康参与者的6个独立实验中,我们使用钕钇铝石榴石激光刺激器专门靶向皮肤中的C纤维和Aδ纤维,并将错觉条件(视觉 - 伤害性刺激一致)与视觉 - 伤害性刺激不一致、视觉 - 本体感觉不一致以及无伤害性刺激的对照条件进行比较。通过直接(问卷)和间接(本体感觉漂移)行为测量来量化错觉。我们发现可以引发伤害性橡皮手错觉(N - RHI),且其取决于视觉 - 伤害性信号的时空一致性,这与多感觉整合的基本原理一致。我们的结果表明,伤害性信息塑造了多感觉身体意识并有助于身体所有权感。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/69f9/11404332/5c4a45458004/jop-165-2240-g001.jpg

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