Active hippocampus during nonconscious memories
Active hippocampus during nonconscious memories
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DOI：
10.1016/s1053-8100(02)00006-5
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发表时间：
2003-03-01
影响因子：
2.4
通讯作者：
Buck, A
中科院分区：
文献类型：
--
作者：
Henke, K;Treyer, V;Buck, A
海马结构因其在有意识的陈述性记忆中的重要性而闻名。在此，我们报告了人类神经影像学的证据，表明海马结构在无意识记忆中还有另外的作用。我们以掩蔽的方式呈现面孔和书面职业的组合，使得被试没有察觉到它们。然而，掩蔽呈现激活了许多与无掩蔽呈现这些刺激时相同的大脑区域。为了诱导对面孔以及与面孔相关的职业信息的无意识提取，被试被要求观看之前掩蔽的面孔，并猜测每个人的职业类别——学者、艺术家和工人。猜测之前掩蔽的面孔与新面孔的职业类别激活了左右海马结构、右侧鼻周皮质以及双侧梭状回区域和额颞区域，已知这些区域介导语义信息的提取。语义处理系统内的这些激活表明，在掩蔽期间获得的概念性知识被无意识地提取了。我们的数据为海马在有意识和无意识记忆中的类似作用提供了线索。（C）2002年爱思唯尔科学（美国）。版权所有。
The hippocampal formation is known for its importance in conscious, declarative memory. Here, we report neuroimaging evidence in humans for an additional role of the hippocampal formation in nonconscious memory. We maskedly presented combinations of faces and written professions such that subjects were not aware of them. Nevertheless, the masked presentations activated many of the brain regions that unmasked presentations of these stimuli did. To induce a nonconscious retrieval of the faces and face-associated occupational information, subjects were instructed to view the previously masked faces and to guess the professional category of each person-academic, artist; and workman. Guessing the professional category of previously masked versus new faces activated the left and right hippocampal formation and right perirhinal cortex as well as bilateral fusiform areas and frontotemporal areas known to mediate the retrieval of semantic information. These activations within the semantic processing system suggest that conceptual knowledge acquired during masking was nonconsciously retrieved. Our data provide clues to an analogous role of the hippocampus in conscious and nonconscious memory. (C) 2002 Elsevier Science (USA). All rights reserved.