Differential Contributions of the Intraparietal Sulcus and the Inferior Parietal Lobe to Attentional Blink: Evidence from Transcranial Magnetic Stimulation
Differential Contributions of the Intraparietal Sulcus and the Inferior Parietal Lobe to Attentional Blink: Evidence from Transcranial Magnetic Stimulation
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DOI：
10.1162/jocn.2010.21426
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发表时间：
2011
影响因子：
3.2
通讯作者：
Ken Kihara;T. Ikeda;D. Matsuyoshi;Nobuyuki Hirose;T. Mima;H. Fukuyama;N. Osaka
中科院分区：
文献类型：
--
作者：
Ken Kihara;T. Ikeda;D. Matsuyoshi;Nobuyuki Hirose;T. Mima;H. Fukuyama;N. Osaka
当在快速连续视觉呈现中识别两个目标（T1和T2）时，如果T2在T1后500毫秒内出现，则对T1的反应会导致T2报告受损（注意眨眼：AB）。AB被认为反映了影响目标感知的注意力的时间限制。最近的研究表明，顶叶内沟（IPS）有助于形成与任务目标相关的注意集，而顶叶下叶（IPL）与注意力的分离和重新定向有关，这些注意力集中在当前注意力焦点之外的相关刺激上。我们使用经颅磁刺激（TMS）研究了IPS和IPL分别参与AB。实验1的结果显示，在T1发作后，AB缺失的程度降低了TMS干扰IPS的活性。此外，T2发作后经颅磁刺激经IPS或IPL输送时，AB赤字增加。在实验2中，参与者被指示忽略T1，只有在T2发作后将TMS送到IPS时，他们才表现出ab样的T2缺陷。研究结果讨论了在AB期间IPS在实现注意集和IPL在促进注意脱离（从T1到T2）中的各自作用的假设。
When two targets (T1 and T2) are to be identified in rapid serial visual presentation, the response to T1 induces impairment of T2 report if T2 appears within 500 msec after T1 (attentional blink: AB). AB is thought to reflect temporal limitations of attention which affect target perception. Recent research suggests that the intraparietal sulcus (IPS) contributes to an attentional set associated with task goals, whereas the inferior parietal lobe (IPL) is associated with the disengagement and reorienting of attention to a relevant stimulus presented outside the current focus of attention. We investigated respective involvement of the IPS and the IPL in AB using transcranial magnetic stimulation (TMS). The results of Experiment 1 showed that the magnitude of AB deficit decreased TMS disrupted activity of the IPS after T1 onset. In addition, an increased AB deficit occurred when TMS was delivered over the IPS or IPL after T2 onset. In Experiment 2, where participants were instructed to ignore T1, they showed an AB-like T2 deficit only when TMS was delivered to the IPS after a T2 onset. Findings are discussed in terms of hypotheses about the respective roles of the IPS, in realizing an attentional set, and the IPL, in contributing to a disengagement of attention (from T1 to T2) during an AB period.