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首页> 外文期刊>The European Journal of Neuroscience >Hands on the future: facilitation of cortico-spinal hand-representation when reading the future tense of hand-related action verbs.
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Hands on the future: facilitation of cortico-spinal hand-representation when reading the future tense of hand-related action verbs.

机译：着手未来：在阅读与手相关的动作动词的未来时态时，有助于皮质脊髓的手表征。

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Reading action-related verbs brings about sensorimotor neural activity, suggesting that the linguistic representation of actions impinges upon neural structures largely overlapping with those involved in actual action execution. While studies of direct action observation indicate that motor mirroring is inherently anticipatory, no information is currently available on whether deriving action-related knowledge from language also takes into account the temporal deployment of actions. Using transcranial magnetic stimulation, here we sought to determine whether reading action verbs conjugated in the future induced higher cortico-spinal activity with respect to when the same verbs were conjugated in the past tense. We recorded motor-evoked potentials (MEPs) from relaxed hand and leg muscles of healthy subjects who were reading silently hand- or leg-related action, sensorial (non-somatic) and abstract verbs conjugated either in future or past tense. The amplitude of MEPs recorded from the hand was higher during reading hand-related action verbs conjugated in the future than in the past. No future-related modulation of leg muscles activity was found during reading leg-related action verbs. In a similar vein, no future-related change of hand or leg muscles reactivity was found for abstract or sensorial verbs. These results indicate that the anticipatory mirroring of hand actions may be triggered by linguistic representations and not only by direct action observation.
机译：阅读与动作相关的动词会引起感觉运动神经活动，这表明动作的语言表示会撞击与实际动作执行中所涉及的神经结构基本重叠的神经结构。虽然直接行动观察的研究表明，运动镜像本质上是预期的，但目前尚无关于从语言中获取与行动相关的知识是否也考虑到行动的时间安排的信息。使用经颅磁刺激，我们试图确定相对于过去时的动词时动词，将来结合的阅读动作动词是否引起较高的皮质-脊髓活动。我们记录了健康受试者的放松手和腿部肌肉的运动诱发电位（MEP），这些受试者正在默默地阅读将来或过去时共轭的手或腿相关动作，感官（非躯体）和抽象动词。在将来阅读与手相关的动作动词时，从手记录的MEP的幅度要比过去高。在阅读与腿相关的动作动词时，未发现与腿部肌肉活动有关的未来相关调节。同样，没有发现抽象或感觉动词与未来有关的手或腿部肌肉反应性变化。这些结果表明，手势的预期镜像可能是由语言表示触发的，而不仅仅是直接动作观察的触发。

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