Eye position affects the perceived location of touch
Eye position affects the perceived location of touch
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DOI：
10.1007/s00221-009-1884-4
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发表时间：
2009-09-01
影响因子：
2
通讯作者：
Harris, Laurence R.
中科院分区：
文献类型：
--
作者：
Harrar, Vanessa;Harris, Laurence R.
在这里，我们展示了手臂上触觉刺激的感知位置向眼睛所看的方向的系统性转移。参与者报告了肘部和手腕之间触摸的感知位置，同时保持眼睛处于不同的偏心位置。由于眼睛位置从正前方改变了+/-25度，触摸的感知位置移动了1到5厘米(1.9度-9.5度视角)。在控制条件下，我们用眼睛直视前方重复该方案。注意力的变化只占眼部位置变化的17%。无论手臂是否可见，由于眼睛位置而引起的触觉变化模式都是可比的。然而，与手臂被遮盖时相比，前臂上的触摸被认为是更远的距离。这些结果是从触觉空间编码的角度来讨论的，这似乎需要整合触觉、视觉和眼睛位置信息。
Here, we demonstrate a systematic shift in the perceived location of a tactile stimulus on the arm toward where the eye is looking. Participants reported the perceived position of touches presented between the elbow and the wrist while maintaining eye positions at various eccentricities. The perceived location of the touch was shifted by between 1 and 5 cm (1.9 degrees-9.5 degrees visual angle) by a change in eye position of +/-25 degrees from straight ahead. In a control condition, we repeat the protocol with the eyes fixating straight ahead. Changes in attention accounted for only 17% of the shift due to eye position. The pattern of tactile shifts due to eye position was comparable whether or not the arm was visible. However, touches at locations along the forearm were perceived as being farther apart when the arm was visible compared to when it was covered. These results are discussed in terms of the coding of tactile space, which seems to require integration of tactile, visual and eye position information.