Dufour André, Touzalin Pascale
Laboratoire d'Imagerie and Neurosciences Cognitives, UMR 7191 CNRS, Université Louis Pasteur, 21, rue Becquerel, 67087, Strasbourg Cedex, France.
Exp Brain Res. 2008 Sep;190(1):91-8. doi: 10.1007/s00221-008-1453-2. Epub 2008 Jun 14.
Studies in monkeys and humans suggest a dissociation between the visual fields near and far from the hand. In this study, we investigated visual detection and spatial discrimination in near- and far-hand fields using the stimulus of a flashing light emitting diode placed near (1 cm) and/or far (40 cm) from the hand. We found that there was greater accuracy (i.e., fewer errors) in the near-hand field. Control experiments indicated that (a) the superior near-hand detection performance was not due to response strategies, (b) the hand did not serve as a spatial reference, (c) the greater accuracy in the near-hand field did not reflect within-hemisphere or within-hemispace facilitation and (d) the effect appeared to be essentially due to viewing of the hand but not proprioceptive information. The results suggest there is an interconnected system for integrated (visual-tactile) coding of peripersonal space centered on body parts and comprising bimodal visuo-tactile cells.
对猴子和人类的研究表明，在手附近和远离手的视野之间存在分离。在本研究中，我们使用放置在手附近（1厘米）和/或远离手（40厘米）的闪烁发光二极管作为刺激，研究了近手视野和远手视野中的视觉检测和空间辨别。我们发现近手视野中的准确性更高（即错误更少）。对照实验表明：（a）近手检测性能 superior 并非由于反应策略；（b）手不作为空间参考；（c）近手视野中更高的准确性并未反映半球内或半空间内的促进作用；（d）这种效应似乎主要是由于对手的视觉观察而非本体感觉信息。结果表明，存在一个以身体部位为中心、包含双峰视觉-触觉细胞的用于个人周边空间整合（视觉-触觉）编码的相互连接系统。 （注：“superior”此处根据语境推测可能是“更好的、更优的”意思，但原英文表述不太准确完整）
