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首页> 外文期刊>Journal of Neurophysiology >TMS of the anterior intraparietal area selectively modulates orientation change detection during action preparation
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TMS of the anterior intraparietal area selectively modulates orientation change detection during action preparation

机译：前部内部区域的TMS在动作制剂期间选择性地调节取向变化检测

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Perception of relevant visual object features can be modulated by the preparation of an action toward it ("action-modulated perception"). For instance, the perception of the orientation of a book can be enhanced when preparing to grasp it (but not when pointing to it). However, the underlying neuronal mechanisms are poorly understood. We argue that brain areas controlling arm movements are involved in establishing this effect through top-down feedback to early visual areas, similar to the neuronal mechanisms linking visual attention and eye movements. To investigate this involvement, we applied transcranial magnetic stimulation to a grasping motor area, the left anterior intraparietal sulcus (aIPS), during grasping or pointing preparation. Concurrently, an orientation change detection task was performed. As a control area, the vertex was stimulated. We found that stimulation of aIPS selectively modulates orientation sensitivity during action preparation compared with control stimulation (vertex), negating the increased orientation sensitivity with grasping preparation over pointing preparation. We argue that aIPS is a critical part of the mechanism underlying perceptual modulations during action preparation. The present results and recent literature suggest that this action-modulated perception for hand movements is implemented through a cortical feedback connection between aIPS and early visual areas.
机译：通过对其的作用（“动作调制的感知”）来调制相关视觉对象特征的感知。例如，在准备掌握它时可以提高书籍的方向的感知（但是在指向它时）。然而，潜在的神经元机制被理解得很差。我们认为控制臂运动的脑区域通过自上而下的反馈来建立这种效果，与早期视觉区域相似，类似于连接视觉注意和眼球运动的神经元机制。为了研究这种参与，在抓握或指向制剂期间，我们将经颅磁刺激施加到掌握的电动机区域，左前部内沟（AIPs）。同时，执行定向改变检测任务。作为控制区域，刺激顶点。我们发现，与对照刺激（顶点）相比，AIP的刺激选择性地调节了在作用制备期间的取向灵敏度，与对照刺激（顶点）相比，否定了对指向制剂的抓握性能增加的取向灵敏度。我们认为AIP是在行动准备期间引起感知调制的机制的关键部分。目前的结果和最近的文献表明，通过AIP和早期视觉区域之间的皮质反馈连接来实现这种动作调制的手动运动的感知。

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