Behavioral investigation on the frames of reference involved in visuomotor transformations during peripheral arm reaching.
Behavioral investigation on the frames of reference involved in visuomotor transformations during peripheral arm reaching.
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DOI：
10.1371/journal.pone.0051856
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发表时间：
2012
期刊：
影响因子：
3.7
通讯作者：
Committeri G
中科院分区：
文献类型：
--
作者：
Ambrosini E;Ciavarro M;Pelle G;Perrucci MG;Galati G;Fattori P;Galletti C;Committeri G
一些心理物理实验发现了以视线为中心和/或以身体为中心的坐标参与手臂运动计划和执行的证据。在这里，我们的目的是通过考虑目标偏心和执行手来研究涉及视觉运动转换的参考框架，以达到空间中的视觉目标。在完全黑暗的环境中，当受试者到达相对于凝视和/或身体的不同位置的记忆目标时，我们检查了几个性能指标，从而区分了以眼睛为中心和以身体为中心的参照系，这些参照系涉及运动矢量的计算。这些误差似乎主要受目标的视觉半球的影响，与目标相对于身体的位置无关，在水平到达维度上存在高估误差（视网膜夸张效应）。使用几个目标位置在凹周视野允许我们揭示一个新的发现，即水平高估误差和目标视网膜偏心之间的正线性相关。此外，我们发现表演手对视觉运动转化过程的独立影响，每只手都伸向同侧。在支持多参照系中目标-效应器整合的内在机制的同时，现有的数据，特别是小目标偏心率处的线性超调，清楚地表明目标位置的视心编码在视觉运动变换中起主要作用。
Several psychophysical experiments found evidence for the involvement of gaze-centered and/or body-centered coordinates in arm-movement planning and execution. Here we aimed at investigating the frames of reference involved in the visuomotor transformations for reaching towards visual targets in space by taking target eccentricity and performing hand into account. We examined several performance measures while subjects reached, in complete darkness, memorized targets situated at different locations relative to the gaze and/or to the body, thus distinguishing between an eye-centered and a body-centered frame of reference involved in the computation of the movement vector. The errors seem to be mainly affected by the visual hemifield of the target, independently from its location relative to the body, with an overestimation error in the horizontal reaching dimension (retinal exaggeration effect). The use of several target locations within the perifoveal visual field allowed us to reveal a novel finding, that is, a positive linear correlation between horizontal overestimation errors and target retinal eccentricity. In addition, we found an independent influence of the performing hand on the visuomotor transformation process, with each hand misreaching towards the ipsilateral side. While supporting the existence of an internal mechanism of target-effector integration in multiple frames of reference, the present data, especially the linear overshoot at small target eccentricities, clearly indicate the primary role of gaze-centered coding of target location in the visuomotor transformation for reaching.
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影响因子：
2.5
作者：
Beurze, S. M.;de Lange, F. P.;Medendorp, W. P.
通讯作者：
Medendorp, W. P.
影响因子：
2
作者：
Harrar, Vanessa;Harris, Laurence R.
通讯作者：
Harris, Laurence R.
DOI：
10.1073/pnas.0913209107
发表时间：
2010-04-27
影响因子：
11.1
作者：
Chang, Steve W. C.;Snyder, Lawrence H.
通讯作者：
Snyder, Lawrence H.
影响因子：
2
作者：
Jones, Stephanie A. H.;Cressman, Erin K.;Henriques, Denise Y. P.
通讯作者：
Henriques, Denise Y. P.
影响因子：
2
作者：
Henriques, DYP;Crawford, JD
通讯作者：
Crawford, JD