Coppi Sara, Jensen Karin B, Ehrsson H Henrik
Department of Neuroscience, Karolinska Institutet, Stockholm, Sweden.
Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden.
iScience. 2025 May 19;28(6):112690. doi: 10.1016/j.isci.2025.112690. eCollection 2025 Jun 20.
The sense of body ownership refers to the perceptual experience of one's body as one's own and can be studied using the rubber hand illusion (RHI). Body ownership relies on multisensory integration, although the relative contributions of different sensory modalities remain unclear. We investigated the role of nociception in body ownership using the nociceptive RHI (N-RHI), a version of the RHI triggered by noxious laser stimulation. Specifically, we assessed whether the N-RHI is as strong as the classic tactile RHI and whether both illusions induce a shift in perceived pain location toward the rubber hand ("nociceptive drift"). Our results reveal similarly strong questionnaire responses and proprioceptive drift in both illusions compared with the control conditions and show that both the tactile RHI and the N-RHI result in a significant nociceptive drift. These findings underscore the role of nociception in body ownership and highlight the multisensory nature of pain localization.
身体所有权感是指将自己的身体感知为自己所有的体验,可以通过橡皮手错觉(RHI)进行研究。身体所有权依赖于多感官整合,尽管不同感官模态的相对贡献仍不明确。我们使用伤害性橡皮手错觉(N-RHI)研究了伤害感受在身体所有权中的作用,N-RHI是一种由有害激光刺激触发的橡皮手错觉版本。具体而言,我们评估了N-RHI是否与经典触觉RHI一样强烈,以及这两种错觉是否都会使疼痛感知位置向橡皮手转移(“伤害感受漂移”)。我们的结果显示,与对照条件相比,两种错觉在问卷反应和本体感觉漂移方面同样强烈,并且表明触觉RHI和N-RHI都会导致显著的伤害感受漂移。这些发现强调了伤害感受在身体所有权中的作用,并突出了疼痛定位的多感官性质。
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