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首页> 外文期刊>The European Journal of Neuroscience >Object size modulates fronto-parietal activity during reaching movements
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Object size modulates fronto-parietal activity during reaching movements

机译：物体的尺寸在运动过程中调节额顶活动

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摘要

In both monkeys and humans, reaching-related sensorimotor transformations involve the activation of a wide fronto-parietal network. Recent neurophysiological evidence suggests that some components of this network host not only neurons encoding the direction of arm reaching movements, but also neurons whose involvement is modulated by the intrinsic features of an object (e.g. size and shape). To date, it has yet to be investigated whether a similar modulation is evident in the human reaching-related areas. To fill this gap, we asked participants to reach towards either a small or a large object while kinematic and electroencephalographic signals were recorded. Behavioral results showed that the precision requirements were taken into account and the kinematics of reaching was modulated depending on the object size. Similarly, reaching-related neural activity at the level of the posterior parietal and premotor cortices was modulated by the level of accuracy determined by object size. We therefore conclude that object size is engaged in the neural computations for reach planning and execution, consistent with the results from physiological studies in non-human primates.
机译：在猴子和人类中，与到达有关的感觉运动转换涉及广泛的额顶网络的激活。最新的神经生理学证据表明，该网络的某些组件不仅托管编码手臂到达运动方向的神经元，而且托管受对象固有特征（例如大小和形状）调节的神经元。迄今为止，尚未进行类似的调制在人类到达相关区域是否明显的研究。为了填补这一空白，我们要求参与者在记录运动学和脑电图信号的同时伸手可及的小物体或大物体。行为结果表明，已考虑了精度要求，并且根据对象大小调整了到达的运动学。类似地，在后顶叶和运动前皮质水平上与到达相关的神经活动受到对象大小决定的准确性水平的调节。因此，我们得出结论，对象大小参与了范围规划和执行的神经计算，这与非人类灵长类动物的生理研究结果一致。

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