"Cutaneous rabbit" hops toward a light: unimodal and cross-modal causality on the skin.
"Cutaneous rabbit" hops toward a light: unimodal and cross-modal causality on the skin.
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DOI：
10.3389/fpsyg.2012.00427
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发表时间：
2012
影响因子：
3.8
通讯作者：
Kanayama N
中科院分区：
文献类型：
--
作者：
Asai T;Kanayama N
我们的体感系统不仅处理空间上的不精确，而且还处理时间上的不精确，导致了特有的时空错觉。重复快速刺激手腕，然后靠近肘部，可以在手臂上的中间位置产生触摸的错觉(就像兔子沿着手臂跳跃一样)。这就是众所周知的“皮肤兔子效应”(CRE)。以前的研究表明，CRE不仅涉及内在的躯体表征，而且还涉及扩展的身体图式的表征，包括皮肤上的因果关系或生命感知。另一方面，与其他多模式因果关系耦合不同，CRE可能不受并发听觉时间信息的影响。本研究考察了一个简单的视觉闪光对同时具有时间和空间信息的CRE的影响。这里，可以提供更强的跨模式因果关系或对应关系。我们在参与者的左臂内侧呈现了三个连续的触觉刺激。刺激出现在手腕、肘部和两者之间的中间。我们五个实验操作的结果表明，一次闪光可以增强或减弱CRE，这取决于它与兔皮肤跳跃的一致性。我们的结果反映：(1)我们的大脑将皮肤上的连续刺激解释为在时间和空间上的运动(单峰因果关系)，以及(2)来自其他通道的并发信号提供了线索，以创建这种外部运动的统一表示(多通道因果关系)，其程度是提供了通道之间的时空同步性。
Our somatosensory system deals with not only spatial but also temporal imprecision, resulting in characteristic spatiotemporal illusions. Repeated rapid stimulation at the wrist, then near the elbow, can create the illusion of touch at intervening locations along the arm (as if a rabbit is hopping along the arm). This is known as the “cutaneous rabbit effect” (CRE). Previous studies have suggested that the CRE involves not only an intrinsic somatotopic representation but also the representation of an extended body schema that includes causality or animacy perception upon the skin. On the other hand, unlike other multi-modal causality couplings, it is possible that the CRE is not affected by concurrent auditory temporal information. The present study examined the effect of a simple visual flash on the CRE, which has both temporal and spatial information. Here, stronger cross-modal causality or correspondence could be provided. We presented three successive tactile stimuli on the inside of a participant’s left arm. Stimuli were presented on the wrist, elbow, and midway between the two. Results from our five experimental manipulations suggest that a one-shot flash enhances or attenuates the CRE depending on its congruency with cutaneous rabbit saltation. Our results reflect that (1) our brain interprets successive stimuli on the skin as motion in terms of time and space (unimodal causality) and that (2) the concurrent signals from other modalities provide clues for creating unified representations of this external motion (multi-modal causality) as to the extent that “spatiotemporal” synchronicity among modalities is provided.
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