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首页> 外文期刊>The Journal of Neuroscience: The Official Journal of the Society for Neuroscience >The dorsal attention network mediates orienting toward behaviorally relevant stimuli in spatial neglect.
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The dorsal attention network mediates orienting toward behaviorally relevant stimuli in spatial neglect.

机译：背侧注意力网络在空间忽略中介导朝向与行为相关的刺激。

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摘要

Experimental neurophysiology and functional neuroimaging have identified a dorsal attention network that encodes neural signals related to the behavioral significance of a stimulus. The core anatomical areas of this network are the frontal eye fields and the posterior parietal cortex, which are interconnected by the superior longitudinal fasciculus. Here, we show that damage or disconnection of this network predicts the extent to which task-relevant stimuli capture attention of human stroke patients with spatial neglect. Healthy volunteers, right-hemisphere-damaged control participants, and patients with left neglect reacted to peripheral targets defined by their color, which were preceded by a brief distracter stimulus. The position of the distracter and its relevance for the current trial were independently varied. In neglect patients with damage including the frontal eye fields and the superior longitudinal fasciculus, ipsilesional distracters impaired orienting into contralesional space regardless of their relevance for the current task. In contrast, patients with sparing of these regions were only impaired when distracters were task-relevant. These findings indicate that the dorsal attention network controls spatial orienting by modulating the saliency of distracter stimuli according to current action goals.
机译：实验性神经生理学和功能性神经影像学已经确定了背侧注意力网络，该网络对与刺激行为意义有关的神经信号进行编码。该网络的核心解剖区域是额眼视野和顶叶后皮质，它们通过上纵束相互连接。在这里，我们表明该网络的损坏或断开连接预测了与任务相关的刺激在多大程度上忽视了中风的人类卒中患者的注意力。健康的志愿者，右半球受损的对照组参与者以及左疏忽的患者对他们的颜色定义的周围目标有反应，然后通过短暂的分散注意力刺激。干扰因素的位置及其与当前试验的相关性是独立变化的。在忽视了包括额眼视野和上纵筋膜损伤在内的受损患者中，同侧干扰物会妨碍他们进入对侧空间，无论其与当前任务的相关性如何。相比之下，只有在分心者与任务相关时，才会保留这些区域的患者。这些发现表明，背侧注意力网络通过根据当前的行动目标调节分散注意力刺激的显着性来控制空间定向。

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