Mixed body- and gaze-centered coding of proprioceptive reach targets after effector movement
Mixed body- and gaze-centered coding of proprioceptive reach targets after effector movement
复制标题
效应器运动后本体感觉到达目标的混合身体和凝视中心编码
DOI：
10.1016/j.neuropsychologia.2016.04.033
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发表时间：
2016
期刊：
影响因子：
2.6
通讯作者：
Fiehler
中科院分区：
文献类型：
--
作者：
Mueller;Fiehler
先前的研究表明，在编码和到达本体感受目标之间进行干预的效应器运动决定了潜在的参考系：如果没有运动发生，则本体感受到达目标在凝视无关的参考系中表示，但在效应器运动之后相对于凝视表示（Mueller和Fiehler，2014 a）。本实验探讨效应器运动是否会导致从凝视无关的、以身体为中心的参考系切换到凝视相关的参考系，或者除了凝视无关的、以身体为中心的参考系之外，是否还采用凝视相关的参考系。人类参与者被要求在完全黑暗的情况下触摸他们左手目标手的一个看不见的手指（本体感受目标）。他们完成了2个条件，其中目标手保持静止在目标位置（静止条件）或主动移动到目标位置，接收触摸并在到达目标之前向后移动（移动条件）。我们分离的位置的运动矢量相对于身体中线和凝视方向。使用相关和回归分析，我们估计的基础上，在静止和移动条件下的水平到达误差的每个参考帧的贡献。以目光为中心的编码只在移动的条件下发现，复制了我们以前的结果。身体为中心的编码占主导地位的固定条件下，而身体和凝视为中心的编码同样强大的移动条件。我们的研究结果表明，从身体为中心的身体和凝视为中心的编码相结合的转变，由于效应器的运动之前达到本体感受的目标。
Previous studies demonstrated that an effector movement intervening between encoding and reaching to a proprioceptive target determines the underlying reference frame: proprioceptive reach targets are represented in a gaze-independent reference frame if no movement occurs but are represented with respect to gaze after an effector movement (Mueller and Fiehler, 2014a). The present experiment explores whether an effector movement leads to a switch from a gaze-independent, body-centered reference frame to a gaze-dependent reference frame or whether a gaze-dependent reference frame is employed in addition to a gaze-independent, body-centered reference frame. Human participants were asked to reach in complete darkness to an unseen finger (proprioceptive target) of their left target hand indicated by a touch. They completed 2 conditions in which the target hand remained either stationary at the target location (stationary condition) or was actively moved to the target location, received a touch and was moved back before reaching to the target (moved condition). We dissociated the location of the movement vector relative to the body midline and to the gaze direction. Using correlation and regression analyses, we estimated the contribution of each reference frame based on horizontal reach errors in the stationary and moved conditions. Gaze-centered coding was only found in the moved condition, replicating our previous results. Body-centered coding dominated in the stationary condition while body- and gaze-centered coding contributed equally strong in the moved condition. Our results indicate a shift from body-centered to combined body- and gaze-centered coding due to an effector movement before reaching towards proprioceptive targets.
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多个空间图的并行更新和加权，以确保全身运动期间的视觉稳定性。
影响因子：
2.5
作者：
J. Tramper;W. Medendorp
通讯作者：
W. Medendorp
影响因子：
3.7
作者：
Ambrosini E;Ciavarro M;Pelle G;Perrucci MG;Galati G;Fattori P;Galletti C;Committeri G
通讯作者：
Committeri G
达到以眼为中心、以身体为中心、以手为中心还是两者的结合？
影响因子：
4.1
作者：
M. Graziano
通讯作者：
M. Graziano
开环指向任务中以凝视为中心的记忆视觉空间重新映射
影响因子：
5.3
作者：
D. Henriques;E. M. Klier;Michael A. Smith;Deborah Lowy;J. Crawford
通讯作者：
J. Crawford
即使存在地标，延迟到达时也会进行以注视为中心的空间更新
影响因子：
1.8
作者：
I. Schütz;D. Henriques;K. Fiehler
通讯作者：
K. Fiehler