Effects of face inversion on the structural encoding and recognition of faces - Evidence from event-related brain potentials
Effects of face inversion on the structural encoding and recognition of faces - Evidence from event-related brain potentials
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DOI：
10.1016/s0926-6410(00)00038-0
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发表时间：
2000-09-01
期刊：
影响因子：
--
通讯作者：
Eimer, M
中科院分区：
文献类型：
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作者：
Eimer, M
研究了面孔反转对事件相关脑电位中面孔特异性成分的影响。事件相关脑电位被认为反映了面孔的结构编码和识别。ERPs被记录到熟悉面孔、陌生面孔和房屋的直立和倒置照片。在第一部分中，参与者必须检测不常出现的目标（手），在第二部分。第二，注意力要么被导向或远离图片刺激。当与直立的陌生面孔相比时，直立的熟悉面孔在刺激后300 ms和450 ms之间（“N400f”）引起增强的负性，在450 ms和650 ms之间（“P600f”）引起增强的正性。有人建议，这些ERP调制所产生的过程中涉及的面孔识别。众所周知，面部倒置会破坏面部识别过程。因此，“N400f”和“P600f”在对倒置的熟悉和不熟悉面孔的反应中通常不存在。面部特定的N170成分在侧后方电极不受面部熟悉度，这表明它反映了处理阶段之前的面部识别。N170在倒置时较直立时延迟和增强。虽然N170增强也观察到倒置相对于直立的房子，刺激倒置引起的N170潜伏期移位是面部特异性的。将注意力从面部转向一个要求苛刻的主要视觉任务，导致倒置和直立面部的N170延迟，这表明面部结构编码的时间过程受到注意力因素的影响。这些结果表明，ERPs可以被用来作为专门的大脑过程的基础结构编码和随后的识别面孔的电生理标记。(C)2000 Elsevier Science B.V.保留所有权利。
It was investigated how face inversion affects face-specific components of event-related brain potentials (ERPs) which are assumed to reflect the structural encoding and the recognition of faces. ERPs were recorded to upright and inverted photographs of familiar faces, unfamiliar faces, and houses. In Part I, participants had to detect infrequently presented targets (hands), in Part. II, attention was either directed towards or away from the pictorial stimuli. When compared with upright unfamiliar faces, upright familiar faces elicited an enhanced negativity between 300 ms and 450 ms ('N400f') and an enhanced positivity between 450 and 650 ms post-stimulus ('P600f'). It is suggested that these ERP modulations are generated by processes involved in the recognition of faces. Face inversion is known to disrupt face recognition processes. Accordingly,'N400f' and 'P600f' were generally absent in response to inverted familiar and unfamiliar faces. The face-specific N170 component at lateral posterior electrodes was not affected by face familiarity, indicating that it reflects processing stages prior to face identification. N170 was delayed and enhanced for inverted relative to upright faces. While N170 enhancements were also observed for inverted relative to upright houses, the N170 latency shift caused by stimulus inversion was face-specific. Directing attention away from the faces towards a demanding primary visual task resulted in an N170 delay for inverted as well as for upright faces, suggesting that the time course of structural encoding of faces is affected by attentional factors. These results demonstrate that ERPs can be used as electrophysiological markers of specialised brain processes underlying the structural encoding and subsequent recognition of faces. (C) 2000 Elsevier Science B.V. All rights reserved.