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Proprioception but not cardiac interoception is related to the rubber hand illusion
Cortex ( IF 3.6 ) Pub Date : 2020-09-16 , DOI: 10.1016/j.cortex.2020.08.026
Áron Horváth 1 , Eszter Ferentzi 2 , Tamás Bogdány 1 , Tibor Szolcsányi 3 , Michael Witthöft 4 , Ferenc Köteles 2
Affiliation  

The rubber hand illusion (RHI) is a widely used tool in the study of multisensory integration. It develops as the interaction of temporally consistent visual and tactile input, which can overwrite proprioceptive information. Theoretically, the accuracy of proprioception may influence the proneness to the RHI but this has received little research attention to date. Concerning the role of cardioceptive information, the available empirical evidence is equivocal. The current study aimed to test the impact of proprioceptive and cardioceptive input on the RHI.

60 undergraduate students (32 females) completed sensory tasks assessing proprioceptive accuracy with respect to the angle of the elbow joint, a heartbeat tracking task assessing cardioceptive accuracy (the Schandry-task) and the RHI.

We found that those with more consistent joint position judgements (i.e., less variable error) in the proprioceptive task were less prone to the illusion, particularly with respect to disembodiment ratings in the asynchronous condition. Systematic error, indicating a systematic distortion in position judgements influenced the illusion in the synchronous condition. Participants with more proprioceptive bias toward the direction of the rubber hand in the proprioceptive test reported a stronger felt embodiment. The results are in accordance with Bayesian causal inference models of multisensory integration. Cardioceptive accuracy, however, was not associated with the strength of the illusion.

We concluded that individual differences in proprioceptive processing impact the RHI, while cardioceptive accuracy is unrelated to it. Theoretical and practical relevance of the findings are discussed.



中文翻译:

本体感觉而非心脏感觉与橡胶手错觉有关

橡胶手错觉(RHI)是研究多感官整合的一种广泛使用的工具。它随着时间上一致的视觉和触觉输入的交互作用而发展,可以覆盖本体感受信息。从理论上讲,本体感受的准确性可能会影响RHI的倾向性,但这迄今很少受到研究关注。关于心脏感受信息的作用,可用的经验证据是模棱两可的。当前的研究旨在测试本体感受和心脏感受输入对RHI的影响。

60名本科生(32名女性)完成了评估肘关节角度的本体感受准确性的感觉任务,完成了评估心脏感受准确性(Schandry任务)和RHI的心跳跟踪任务。

我们发现,在本体感觉任务中具有更一致的关节位置判断(即,较少的可变误差)的人更不容易产生错觉,尤其是在异步条件下的实施能力评分方面。系统错误,表明位置判断的系统失真影响了同步条件下的错觉。在本体感觉测试中朝向橡胶手的方向具有更大本体感觉偏向的参与者报告了更强的毛毡实施方式。结果符合多感觉整合的贝叶斯因果推理模型。但是,心脏感受的准确性与幻觉的强度无关。

我们得出的结论是,本体感受处理中的个体差异会影响RHI,而心脏感受准确性与它无关。研究结果的理论和实际意义进行了讨论。

更新日期:2020-10-05
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