Brain waves following remembered faces index conscious recollection
Brain waves following remembered faces index conscious recollection
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DOI：
10.1016/s0926-6410(98)00050-0
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发表时间：
1999-03-01
期刊：
影响因子：
--
通讯作者：
Yamada, S
中科院分区：
文献类型：
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作者：
Paller, KA;Bozic, VS;Yamada, S
人们通常一眼就能确定一张脸是否属于某个已知的人。为了研究这一记忆壮举背后的大脑机制，我们记录了时间锁定的EEG信号以进行面部展示。在研究阶段，40张不认识的面孔被呈现出来，其中20张伴随着模仿那个人说话的声音。指令是记住带有口述传记信息的面孔(R-面孔)，忘记其他面孔(F-面孔)。在测试阶段，名人脸和非名人脸以视觉退化的方式呈现。受试者做出了两个选择的名气判断，并且观察到启动的形式是对老面孔的反应比对新面孔的反应更快、更准确。R型面孔和F型面孔的启动效应没有差异。在第二个实验中，面孔在测试中没有退化，只有当面孔连续出现两次时，才会产生行为反应。刺激开始后300~900ms的额区和顶枕区诱发的脑电位，右脸大于F脸。后来测试的识别对R脸比对F脸更准确。由于研究阶段的操作影响识别，但不影响启动，我们得出结论，该程序成功地将回忆加工的神经关联从启动所标示的更自动的面孔记忆使用中分离出来。(C)1999 Elsevier Science B.V.保留所有权利。
At a glance, one can often determine whether a face belongs to a known individual. To investigate brain mechanisms underlying this memory feat, we recorded EEG signals time-locked to face presentations. In the study phase, 40 unknown faces were presented, 20 of which were accompanied by a voice simulating that person speaking. Instructions were to remember the faces with spoken biographical information (R-faces) and to forget the others (F-faces). In the test phase, famous and non-famous faces were presented in a visually degraded manner. Subjects made two-choice fame judgments and priming was observed in the form of faster and more accurate responses for old than for new non-famous faces. Priming did not differ between R-faces and F-faces. In a second experiment, faces were not degraded at test and behavioral responses were made only when faces were presented twice in immediate succession. Brain potentials elicited 300 to 900 ms after stimulus onset from frontal and parieto-occipital scalp regions were larger for R-faces than for F-faces. Recognition tested later was more accurate for R-faces than for F-faces. Because the study-phase manipulation influenced recognition but not priming, we conclude that this procedure succeeded in isolating neural correlates of recollective processing from more automatic uses of face memory as indexed by priming. (C) 1999 Elsevier Science B.V. All rights reserved.