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Reference frame for reaching movements to somatsensory targets

用于实现躯体感觉目标运动的参考系

基本信息

批准号：
196036037
负责人：
Professorin Dr. Katja Fiehler
金额：
--
依托单位：
Arbeitsgruppe Wahrnehmung und Handlung
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2011
资助国家：
德国
起止时间：
2010-12-31 至 2017-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/196036037?language=en
关键词：
Reference frame reaching movements somatsensory

项目摘要

Goal-directed movements to targets perceived by somatosensory information, such as touch or proprioception, play an important role for everyday activities, e.g. grasping the keys in a purse or scratching an itchy body part. In order to transform the somatosensory input into a movement plan, information about target and effector (e.g. hand) needs to be represented in a common spatial reference frame. While there is converging evidence for a gaze-centered representation of visual targets, the reference frame used to represent somatosensory targets for movements is rather unclear. The goal of the present proposal is to determine the reference frame for proprioceptive targets for reaching and to further examine how the spatial representation changes due to a movement of the target effector. Three projects are proposed which aim to (a) determine the contribution of body-, hand-, and gaze-centered reference frames for proprioceptive reach targets, (b) identify the brain areas representing proprioceptive reach targets in a body- and/or gaze-centered reference frame, and (c) reveal how multiple spatial representations of visual and proprioceptive reach targets are combined and integrated into a common spatial representation. These goals shall be achieved by a multimodal approach combining behavioral experiments, functional neuroimaging and computational modelling.

通过诸如触摸或本体感觉的躯体感觉信息感知到的针对目标的目标定向运动在日常活动中起着重要作用，例如抓住钱包中的钥匙或抓痒的身体部位。为了将体感输入转换为运动计划，需要在共同的空间参考系中表示关于目标和效应器（例如手）的信息。虽然有会聚的证据表明视觉目标的注视为中心的表示，用于表示运动的体感目标的参考框架是相当不清楚的。本提案的目标是确定用于达到的本体感受目标的参考系，并进一步检查由于目标效应器的移动而导致的空间表示如何变化。提出了三个项目，其目的是（a）确定身体，手，和凝视为中心的参考框架的贡献，本体感受达到目标，（B）确定大脑区域代表本体感受达到目标在身体和/或凝视为中心的参考框架，（c）揭示视觉和本体感受达到目标的多个空间表示相结合，并集成到一个共同的空间表示。这些目标将通过结合行为实验、功能神经成像和计算建模的多模式方法来实现。