Interaction with other sensory information is important for prediction of tactile events. Recent studies have reported that the approach of visual information toward the body facilitates prediction of subsequent tactile events. However, the processing of tactile events is influenced by multiple spatial coordinates, and it remains unclear how this approach effect influences tactile events in different spatial coordinates, i.e., spatial reference frames. We investigated the relationship between the prediction of a tactile stimulus via this approach effect and spatial coordinates by comparing ERPs. Participants were asked to place their arms on a desk and required to respond tactile stimuli which were presented to the left (or right) index finger with a high probability (80%) or to the opposite index finger with a low probability (20%). Before the presentation of each tactile stimulus, visual stimuli approached sequentially toward the hand to which the high-probability tactile stimulus was presented. In the uncrossed condition, each hand was placed on the corresponding side. In the crossed condition, each hand was crossed and placed on the opposite side, i.e., left (right) hand placed on the right (left) side. Thus, the spatial location of the tactile stimulus and hand was consistent in the uncrossed condition and inconsistent in the crossed condition. The results showed that N1 amplitudes elicited by high-probability tactile stimuli only decreased in the uncrossed condition. These results suggest that the prediction of a tactile stimulus facilitated by approaching visual information is influenced by multiple spatial coordinates.

中文翻译：

---

多个空间坐标影响通过接近视觉刺激促进的触觉事件的预测。


与其他感官信息的交互对于触觉事件的预测很重要。最近的研究表明，视觉信息对身体的影响有助于预测随后的触觉事件。然而，触觉事件的处理受到多个空间坐标的影响，并且这种接近效应如何影响不同空间坐标（即空间参考系）中的触觉事件仍不清楚。我们通过比较 ERP，研究了通过这种方法效应预测触觉刺激与空间坐标之间的关系。参与者被要求将手臂放在桌子上，并要求对触觉刺激作出反应，这些刺激以高概率（80％）呈现给左（或右）食指，或以低概率（20％）呈现在相反的食指上。在呈现每个触觉刺激之前，视觉刺激依次接近呈现高概率触觉刺激的手。在未交叉的情况下，每只手都放在相应的一侧。交叉状态下，每只手交叉放在相对侧，即左（右）手放在右（左）侧。因此，触觉刺激和手的空间位置在未交叉条件下是一致的，而在交叉条件下是不一致的。结果表明，高概率触觉刺激引起的 N1 振幅仅在未交叉条件下下降。这些结果表明，通过接近视觉信息促进的触觉刺激的预测受到多个空间坐标的影响。