Multisensory conflict modulates the spread of visual attention across a multisensory object.
Multisensory conflict modulates the spread of visual attention across a multisensory object.
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DOI：
10.1016/j.neuroimage.2010.04.245
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发表时间：
2010-08-15
期刊：
影响因子：
5.7
通讯作者：
Woldorff, Marty G.
中科院分区：
文献类型：
--
作者：
Zimmer, Ulrike;Roberts, Kenneth C.;Harshbarger, Todd B.;Woldorff, Marty G.
与来自不同地点的与任务无关的声音同步发生的视觉刺激的空间注意不仅会导致视觉皮质的活动增加，而且会导致听觉皮质的活动增加，这显然反映了注意在空间和通道中与物体相关的传播。刺激冲突的处理，包括多感觉刺激冲突，已知会激活前扣带回皮质，但交互作用对感觉皮质的影响仍未被研究。在这里，我们使用fMRI来检查先前观察到的视觉注意在感觉皮质上的多感觉扩散是否会受到相关视觉输入和无关听觉输入之间是否存在概念或对象相关冲突的调节。受试者在视觉上注意到两个偏侧化的视觉字母流中的一个，而同时出现的与任务无关的字母声音集中呈现，这些声音可能与视觉字母一致，也可能不一致。我们观察到，当注意到视觉成分时，在ACC和对侧视觉皮质中，不一致的字母-声音组合的显著增强，可能反映了冲突检测和在不一致的试验中提高对视觉刺激的注意力的需要。在听觉皮质中，如果空间上不协调的听觉刺激是不协调的，则双侧的活动增加，但当一致时，仅在左侧，语言占主导地位的一侧。我们的结论是，冲突的、不一致的声音，即使是与任务无关的，也会比一致的声音更能分散注意力，从而更好地吸引注意力。这种对注意力的更大捕捉反过来会导致听觉皮质活动的增加。
Spatial attention to a visual stimulus that occurs synchronously with a task-irrelevant sound from a different location can lead to increased activity not only in visual cortex, but also auditory cortex, apparently reflecting the object-related spreading of attention across both space and modality. The processing of stimulus conflict, including multisensory stimulus conflict, is known to activate the anterior cingulate cortex (ACC), but the interactive influence on the sensory cortices remains relatively unexamined. Here we used fMRI to examine whether the multisensory spread of visual attention across the sensory cortices previously observed will be modulated by whether there is conceptual or object-related conflict between the relevant visual and irrelevant auditory inputs. Subjects visually attended to one of two lateralized visual letter streams while synchronously occurring, task-irrelevant, letter sounds were presented centrally, which could be either congruent or incongruent with the visual letters. We observed significant enhancements for incongruent versus congruent letter-sound combinations in the ACC and in the contralateral visual cortex when the visual component was attended, presumably reflecting the conflict detection and the need for boosted attention to the visual stimulus during incongruent trials. In the auditory cortices, activity increased bilaterally if the spatially discordant auditory stimulation was incongruent, but only in the left, language-dominant side when congruent. We conclude that a conflicting incongruent sound, even when task-irrelevant, distracts more strongly than a congruent one, leading to greater capture of attention. This greater capture of attention in turn results in increased activity in the auditory cortex.
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DOI：
10.3758/bf03193763
发表时间：
2007-04-01
期刊：
PERCEPTION & PSYCHOPHYSICS
影响因子：
--
作者：
Dalton, Polly;Spence, Charles
通讯作者：
Spence, Charles
影响因子：
3.7
作者：
Penhune, VB;Zatorre, RJ;Evans, AC
通讯作者：
Evans, AC
影响因子：
3.7
作者：
Noppeney, Uta;Josephs, Oliver;Friston, Karl J.
通讯作者：
Friston, Karl J.
影响因子：
4.1
作者：
EGLY, R;DRIVER, J;RAFAL, RD
通讯作者：
RAFAL, RD
影响因子：
3.7
作者：
Fan, Jin;Hof, Patrick R.;Posner, Michael I.
通讯作者：
Posner, Michael I.