Long-term expertise with artificial objects increases visual competition with early face categorization processes
Long-term expertise with artificial objects increases visual competition with early face categorization processes
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DOI：
10.1162/jocn.2007.19.3.543
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发表时间：
2007-03-01
影响因子：
3.2
通讯作者：
Curran, Tim
中科院分区：
文献类型：
--
作者：
Rossion, Bruno;Collins, Daniel;Curran, Tim
在处理面孔和专业知识的对象所涉及的知觉机制之间的共性程度是激烈的争论。为了澄清这个问题，我们记录了枕颞事件相关电位，同时处理专业知识的视觉对象时，面对的反应。在汽车专家固定汽车的图片，我们观察到一个大的减少诱发电位引起的面部刺激之间的130和200毫秒，N170。当汽车和面部刺激被200毫秒的空白间隔分开时，这种感觉抑制要低得多。有和没有这种延迟，有一个很强的相关性之间的面部诱发的N170振幅下降和受试者的汽车专业知识水平，在一个独立的行为任务。总之，这些结果表明，在专业领域的面部和非面部对象的神经表征竞争的视觉过程中，早在130-200毫秒刺激开始后的枕颞叶皮层。
The degree of commonality between the perceptual mechanisms involved in processing faces and objects of expertise is intensely debated. To clarify this issue, we recorded occipitotemporal event-related potentials in response to faces when concurrently processing visual objects of expertise. In car experts fixating pictures of cars, we observed a large decrease of an evoked potential elicited by face stimuli between 130 and 200 msec, the N170. This sensory suppression was much lower when the car and face stimuli were separated by a 200-msec blank interval. With and without this delay, there was a strong correlation between the face-evoked N170 amplitude decrease and the subject's level of car expertise as measured in an independent behavioral task. Together, these results show that neural representations of faces and nonface objects in a domain of expertise compete for visual processes in the occipito-temporal cortex as early as 130-200 msec following stimulus onset.