Choice reaching with a LEGO arm robot (CoRLEGO): The motor system guides visual attention to movement-relevant information.
Choice reaching with a LEGO arm robot (CoRLEGO): The motor system guides visual attention to movement-relevant information.
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DOI：
10.1016/j.neunet.2015.10.005
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发表时间：
2015-12
期刊：
影响因子：
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通讯作者：
Heinke D
中科院分区：
文献类型：
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作者：
Strauss S;Woodgate PJ;Sami SA;Heinke D
我们提出了一个神经生物学启发的机器人模型的扩展，称为CoRLEGO(选择使用乐高手臂机器人到达)。CoRLEGO模拟了来自选择到达任务(CRT)的实验证据。在CRT中，参与者被要求快速到达并触摸屏幕上呈现的物品。这些实验表明，非目标项目可以将到达运动从理想轨迹转移到目标项目。这被认为是对到达目标的注意力选择会泄漏到运动系统的证据。使用竞争性目标选择和电机参数(动态神经场)的拓扑表示，CoRLEGO能够模拟这种泄漏效应。此外，如果到达的目标是由其颜色奇异性(即，红色方块之间的绿色正方形或反之亦然)确定的，则随着目标颜色的重复(色带)，到达的轨迹变得更直。这种颜色启动效应也可以用CoRLEGO建模。文中还给出了CoRLEGO的一个扩展。这一扩展模拟了运动皮质上的经颅直流电刺激(TDC)调节颜色启动效应的发现(Woodgate等人，2015)。新CoRLEGO的结果表明，从运动系统到大脑注意系统(顶叶皮质)的反馈连接引导视觉注意力从视觉刺激中提取与运动相关的信息(即颜色)。这篇论文进一步证明了运动系统和注意力系统之间存在着密切的相互作用。这一证据与将马达系统作为一系列处理阶段的终点的传统概念相矛盾。在论文的最后，我们讨论了CoRLEGO的预测，以及从这项工作中出现的神经生物学启发的机器人的经验教训。
We present an extension of a neurobiologically inspired robotics model, termed CoRLEGO (Choice reaching with a LEGO arm robot). CoRLEGO models experimental evidence from choice reaching tasks (CRT). In a CRT participants are asked to rapidly reach and touch an item presented on the screen. These experiments show that non-target items can divert the reaching movement away from the ideal trajectory to the target item. This is seen as evidence attentional selection of reaching targets can leak into the motor system. Using competitive target selection and topological representations of motor parameters (dynamic neural fields) CoRLEGO is able to mimic this leakage effect. Furthermore if the reaching target is determined by its colour oddity (i.e. a green square among red squares or vice versa), the reaching trajectories become straighter with repetitions of the target colour (colour streaks). This colour priming effect can also be modelled with CoRLEGO. The paper also presents an extension of CoRLEGO. This extension mimics findings that transcranial direct current stimulation (tDCS) over the motor cortex modulates the colour priming effect (Woodgate et al., 2015). The results with the new CoRLEGO suggest that feedback connections from the motor system to the brain’s attentional system (parietal cortex) guide visual attention to extract movement-relevant information (i.e. colour) from visual stimuli. This paper adds to growing evidence that there is a close interaction between the motor system and the attention system. This evidence contradicts the traditional conceptualization of the motor system as the endpoint of a serial chain of processing stages. At the end of the paper we discuss CoRLEGO’s predictions and also lessons for neurobiologically inspired robotics emerging from this work.