Multisensory visual-auditory object recognition in humans: A high-density electrical mapping study
Multisensory visual-auditory object recognition in humans: A high-density electrical mapping study
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DOI：
10.1093/cercor/bhh007
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发表时间：
2004-04-01
期刊：
影响因子：
3.7
通讯作者：
Foxe, JJ
中科院分区：
文献类型：
--
作者：
Molholm, S;Ritter, W;Foxe, JJ
多感官的物体识别过程进行了研究，通过检查视觉和听觉输入对象识别后的综合影响-在这种情况下，动物的图片和发声。在行为上，受试者在识别目标时，图片和发声相匹配（即来自同一动物），比目标仅以一种感觉方式表示时更快，更准确。这种行为增强伴随着视觉诱发N1成分潜伏期范围和一般地形区域中诱发电位的调制，这与腹侧视觉流中的早期特征处理相关。这种多感觉效应的高密度地形图和偶极子建模与枕颞侧皮质的发生器一致，表明听觉输入调制枕侧皮质区域的处理。这种调制的时间和头皮地形表明，有多感官的影响，在什么被认为是一个相对较早的阶段的视觉对象识别过程中，这种调制发生在区域的视觉系统，传统上被认为是unisensory处理领域。多感官输入还调节了视觉“选择负性”，这是诱发电位的一个注意力依赖性成分，通常在受试者选择性地注意视觉刺激的特定特征时诱发。
Multisensory object-recognition processes were investigated by examining the combined influence of visual and auditory inputs upon object identification - in this case, pictures and vocalizations of animals. Behaviorally, subjects were significantly faster and more accurate at identifying targets when the picture and vocalization were matched (i.e. from the same animal), than when the target was represented in only one sensory modality. This behavioral enhancement was accompanied by a modulation of the evoked potential in the latency range and general topographic region of the visual evoked N1 component, which is associated with early feature processing in the ventral visual stream. High-density topographic mapping and dipole modeling of this multisensory effect were consistent with generators in lateral occipito-temporal cortices, suggesting that auditory inputs were modulating processing in regions of the lateral occipital cortices. Both the timing and scalp topography of this modulation suggests that there are multisensory effects during what is considered to be a relatively early stage of visual object-recognition processes, and that this modulation occurs in regions of the visual system that have traditionally been held to be unisensory processing areas. Multisensory inputs also modulated the visual 'selection-negativity', an attention dependent component of the evoked potential this is usually evoked when subjects selectively attend to a particular feature of a visual stimulus.