Selective and divided attention during visual discriminations of shape, color, and speed: functional anatomy by positron emission tomography
Selective and divided attention during visual discriminations of shape, color, and speed: functional anatomy by positron emission tomography
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DOI：
10.1523/jneurosci.11-08-02383.1991
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发表时间：
1991-08
期刊：
影响因子：
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通讯作者：
M. Corbetta;F. Miezin;S. Dobmeyer;G. Shulman;S. Petersen
中科院分区：
文献类型：
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作者：
M. Corbetta;F. Miezin;S. Dobmeyer;G. Shulman;S. Petersen
正电子发射断层扫描（PET）被用来识别神经系统参与辨别的形状，颜色和速度的视觉刺激条件下的选择性和分散注意力。心理物理学证据表明，敏感性判别微妙的刺激变化，在相同的不同匹配任务时，受试者选择性地出席了一个属性比当他们之间的属性分配注意力。脑活动的PET测量表明，纹外视觉活动的调制主要由选择性注意的任务条件产生。对速度的注意激活了左顶下小叶的一个区域。对颜色的注意激活了侧沟和枕叶背外侧皮层的一个区域，而对形状的注意激活了侧沟（类似于颜色）、梭状回和海马旁回以及沿着颞上级沟的颞叶皮层。在视觉系统之外，选择性注意和分散注意激活了不重叠的大脑区域。选择性条件激活苍白球，尾状核，外侧眶额皮质，后丘脑/丘，和岛屿运动前区，而分开的条件激活前扣带回和背外侧前额叶皮质。视觉系统的结果表明，对不同特征的选择性注意调节了纹外皮层不同区域的活动，这些区域似乎专门用于处理所选特征。在选择性注意和分散注意条件下，视外脑区域的激活模式也表明，戒律判断涉及不同的神经系统，这取决于注意力策略。
Positron emission tomography (PET) was used to identify the neural systems involved in discriminating the shape, color, and speed of a visual stimulus under conditions of selective and divided attention. Psychophysical evidence indicated that the sensitivity for discriminating subtle stimulus changes in a same-different matching task was higher when subjects selectively attended to one attribute than when they divided attention among the attributes. PET measurements of brain activity indicated that modulations of extrastriate visual activity were primarily produced by task conditions of selective attention. Attention to speed activated a region in the left inferior parietal lobule. Attention to color activated a region in the collateral sulcus and dorsolateral occipital cortex, while attention to shape activated collateral sulcus (similarly to color), fusiform and parahippocampal gyri, and temporal cortex along the superior temporal sulcus. Outside the visual system, selective and divided attention activated nonoverlapping sets of brain regions. Selective conditions activated globus pallidus, caudate nucleus, lateral orbitofrontal cortex, posterior thalamus/colliculus, and insular-premotor regions, while the divided condition activated the anterior cingulate and dorsolateral prefrontal cortex. The results in the visual system demonstrate that selective attention to different features modulates activity in distinct regions of extrastriate cortex that appear to be specialized for processing the selected feature. The disjoint pattern of activations in extravisual brain regions during selective- and divided-attention conditions also suggests that preceptual judgements involve different neural systems, depending on attentional strategies.