Face repetition effects in implicit and explicit memory tests as measured by fMRI
Face repetition effects in implicit and explicit memory tests as measured by fMRI
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DOI：
10.1093/cercor/12.2.178
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发表时间：
2002-02-01
期刊：
影响因子：
3.7
通讯作者：
Dolan, RJ
中科院分区：
文献类型：
--
作者：
Henson, RNA;Shallice, T;Dolan, RJ
最近神经生理学和神经成像研究结果之间的相似之处表明，重复的刺激处理会导致大脑中与该处理相关的区域的反应减少--一种“重复抑制”效应。在本研究中，志愿者在功能磁共振成像(FMRI)过程中对重复呈现熟悉和陌生面孔进行了两项任务。在内隐任务中，他们做出了声誉判断(不考虑重复)；在外显任务中，他们做出了间歇性的再认判断(不考虑熟悉度)。只有在内隐任务中才能观察到重复抑制：对于右侧梭形区域的著名面孔，以及在左侧枕下区的著名面孔和陌生面孔。因此，重复抑制并不是对刺激进行重复感知处理的自动结果。
Recent parallels between neurophysiological and neuroimaging findings suggest that repeated stimulus processing produces decreased responses in brain regions associated with that processing - a 'repetition suppression' effect. In the present study, volunteers performed two tasks on repeated presentation of famous and unfamiliar faces during functional magnetic resonance imaging (fMRI). In the implicit task, they made fame-judgements (regardless of repetition); in the explicit task, they made episodic recognition judgements (regardless of familiarity). Only in the implicit task was repetition suppression observed: for famous faces in a right lateral fusiform region, and for both famous and unfamiliar faces in a left inferior occipital region. Repetition suppression is therefore not an automatic consequence of repeated perceptual processing of stimuli.