EVENT-RELATED BRAIN POTENTIALS TO HUMAN FACES IN INFANTS
EVENT-RELATED BRAIN POTENTIALS TO HUMAN FACES IN INFANTS
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DOI：
10.2307/1129080
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发表时间：
1981-01-01
影响因子：
4.6
通讯作者：
NORCIA, AM
中科院分区：
文献类型：
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作者：
COURCHESNE, E;GANZ, L;NORCIA, AM
记录对速示镜呈现的2张人脸照片的事件相关脑电位（ERP）反应4-7个月。老婴儿。对于每个婴儿，选择一张脸频繁出现（P = 0.88，低信息事件），另一张脸不频繁出现（P = 0.12，高信息事件）。这两种类型的事件在我们的婴儿中引起了长潜伏期的负ERP波（约。700 ms），称为Nc，和一个长潜伏期的正波（约1360 ms），称为Pc。不一致的，不经常出现的脸引起的Nc波的振幅更高，潜伏期更长，比那些引起的频繁的脸。显然，婴儿能够记住在一次又一次试验中出现频率较高的面孔，并能将其与差异面孔区分开来。不一致的事件引起的Pc波的振幅不显着高于那些引起的频繁事件。在成人和儿童中，许多研究人员发现不一致的事件引起阳性P3波（潜伏期约300-800 ms）。这样的波动是看不见的。在所有与认知过程相关的ERP波中，成熟最早出现在Nc波中;它与受试者对引起注意的事件或感兴趣的事件的感知有关。显然，ERP反应可以为研究婴儿认知发展提供一种敏感的手段，因为它们不依赖于一个完整的运动反应系统。
Event-related brain potentials (ERP) in response to tachistoscopically presented photographs of 2 human faces were recorded for 4-7 mo. old infants. For each infant 1 face was chosen to be presented frequently (P = 0.88, a low-information event) and the other infrequently (P = 0.12, a high-information event). Both types of events elicited in our infants a long-latency negative ERP wave (ca. 700 ms), termed Nc, and a long-latency positive wave (about 1360 ms), termed Pc. The discrepant, infrequently presented face elicited Nc waves which were higher in amplitude and longer in latency than those elicited by the frequent face. Apparently, the infants were able to remember the frequently presented face from trial to trial and to discriminate it from the discrepant face. The discrepant event elicited Pc waves which were insignificantly higher in amplitude than those elicited by frequent events. In adults and children, discrepant events were found by numerous researchers to elicit positive P3 waves (latency about 300-800 ms). Such waves could not be discerned. Of all the ERP waves which were related to cognitive processes, maturation appears earliest in the Nc wave; it is related to the perception of attention-getting events or events of interest to the subject. Apparently ERP responses could provide a sensitive means for investigating infant cognitive development, since they do not depend upon an integrated motor-response system.