Preparatory Activity in Posterior Temporal Cortex Causally Contributes to Object Detection in Scenes
Preparatory Activity in Posterior Temporal Cortex Causally Contributes to Object Detection in Scenes
复制标题
后颞叶皮层的准备活动有助于场景中的物体检测
DOI：
10.1162/jocn_a_00845
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发表时间：
2015
影响因子：
3.2
通讯作者：
M. Peelen
中科院分区：
文献类型：
--
作者：
Reshanne R. Reeder;F. Perini;M. Peelen
视觉选择性注意理论认为，自上而下的预备注意信号介导了任务相关信息在杂乱场景中的选择。神经影像学和电生理学研究为这一假设提供了相关证据，发现在搜索线索和目标发生之间的时间段内，视觉皮层中的目标选择神经群的活动增加。在这项研究中，我们使用在线TMS测试是否准备在视觉皮层神经活动的因果关系参与自然物体检测。在两个实验中，参与者在一组不同的真实世界场景的照片中检测物体类别（汽车，人）的存在。经颅磁刺激被应用于后颞叶皮层的一个区域，该区域被功能磁共振成像识别为携带类别特异性准备活动模式。结果表明，在场景开始之前（-200和-100毫秒），TMS应用于后颞叶皮层，相对于顶点和早期视觉皮层刺激，会损害随后呈现的场景中物体类别的检测。这种效果是特定的类别水平检测和注意力模板的参与者采用的类型，与最强的效果观察到的参与者采用类别水平的模板。这些结果提供了证据的因果关系的作用，准备注意在调解检测对象在杂乱的日常生活环境。
Theories of visual selective attention propose that top–down preparatory attention signals mediate the selection of task-relevant information in cluttered scenes. Neuroimaging and electrophysiology studies have provided correlative evidence for this hypothesis, finding increased activity in target-selective neural populations in visual cortex in the period between a search cue and target onset. In this study, we used online TMS to test whether preparatory neural activity in visual cortex is causally involved in naturalistic object detection. In two experiments, participants detected the presence of object categories (cars, people) in a diverse set of photographs of real-world scenes. TMS was applied over a region in posterior temporal cortex identified by fMRI as carrying category-specific preparatory activity patterns. Results showed that TMS applied over posterior temporal cortex before scene onset (−200 and −100 msec) impaired the detection of object categories in subsequently presented scenes, relative to vertex and early visual cortex stimulation. This effect was specific to category level detection and was related to the type of attentional template participants adopted, with the strongest effects observed in participants adopting category level templates. These results provide evidence for a causal role of preparatory attention in mediating the detection of objects in cluttered daily-life environments.
影响因子：
1.8
作者：
Vickery, TJ;King, LW;Jiang, YH
通讯作者：
Jiang, YH
DOI：
10.1037/0096-1523.31.6.1476
发表时间：
2005-12-01
影响因子：
2.1
作者：
Evans, KK;Treisman, A
通讯作者：
Treisman, A