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首页> 外文期刊>Neuron >Delayed striate cortical activation during spatial attention.
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Delayed striate cortical activation during spatial attention.

机译：空间注意期间延迟的纹状体皮质激活。

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摘要

Recordings of event-related potentials (ERPs) and event-related magnetic fields (ERMFs) were combined with functional magnetic resonance imaging (fMRI) to study visual cortical activity in humans during spatial attention. While subjects attended selectively to stimulus arrays in one visual field, fMRI revealed stimulus-related activations in the contralateral primary visual cortex and in multiple extrastriate areas. ERP and ERMF recordings showed that attention did not affect the initial evoked response at 60-90 ms poststimulus that was localized to primary cortex, but a similarly localized late response at 140-250 ms was enhanced to attended stimuli. These findings provide evidence that the primary visual cortex participates in the selective processing of attended stimuli by means of delayed feedback from higher visual-cortical areas.
机译：事件相关电位（ERP）和事件相关磁场（ERMF）的记录与功能磁共振成像（fMRI）相结合，以研究空间注意期间人类的视觉皮层活动。当受试者选择性地在一个视野中观察刺激阵列时，fMRI揭示了对侧初级视觉皮层和多个外条纹区域中与刺激相关的激活。 ERP和ERMF记录表明，注意力不影响局限在初级皮层的刺激后60-90 ms的初始诱发反应，但类似的局限性在140-250 ms的晚期反应增强了参与刺激。这些发现提供了证据，即初级视觉皮层通过来自较高的视觉皮层区域的延迟反馈参与了对参与的刺激的选择性处理。

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