Dissociation between the activity of the right middle frontal gyrus and the middle temporal gyrus in processing semantic priming.
Dissociation between the activity of the right middle frontal gyrus and the middle temporal gyrus in processing semantic priming.
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DOI：
10.1371/journal.pone.0022368
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发表时间：
2011
期刊：
影响因子：
3.7
通讯作者：
Constable RT
中科院分区：
文献类型：
--
作者：
Laufer I;Negishi M;Lacadie CM;Papademetris X;Constable RT
本研究采用事件相关功能磁共振成像（fMRI）技术，探讨右侧额中回（MFG）和颞中回（MTG）对启动-靶关联强度对重复启动效应的敏感性差异。在实验条件下（RP），目标发生在重复呈现的启动内的oddball设计。在控制条件下（CTR），目标遵循一个单一的介绍总理与目标的RP相同的概率。为了操纵主词和目标词之间的语义重叠，（RP和CTR）采用拟声词“oink”作为启动词，参考词“pig”作为目标（OP），反之亦然（PO）结果表明，左MTG对适应的释放敏感，而右MTG和MFG对序列规则性敏感提取和验证。然而，OP和PO之间的解离活性显示在RP中仅在右侧MFG中。具体而言，靶“猪”（OP）和CTR中的物理等效靶引起相当的失活，而靶“猪”（PO）在RP中引起的抑制反应比在CTR中少。这种相互作用在右MFG解释整合这些影响到一个竞争模型之间的知觉和概念效应的启动处理。
The aim of this event-related functional magnetic resonance imaging (fMRI) study was to test whether the right middle frontal gyrus (MFG) and middle temporal gyrus (MTG) would show differential sensitivity to the effect of prime-target association strength on repetition priming. In the experimental condition (RP), the target occurred after repetitive presentation of the prime within an oddball design. In the control condition (CTR), the target followed a single presentation of the prime with equal probability of the target as in RP. To manipulate semantic overlap between the prime and the target both conditions (RP and CTR) employed either the onomatopoeia “oink” as the prime and the referent “pig” as the target (OP) or vice-versa (PO) since semantic overlap was previously shown to be greater in OP. The results showed that the left MTG was sensitive to release of adaptation while both the right MTG and MFG were sensitive to sequence regularity extraction and its verification. However, dissociated activity between OP and PO was revealed in RP only in the right MFG. Specifically, target “pig” (OP) and the physically equivalent target in CTR elicited comparable deactivations whereas target “oink” (PO) elicited less inhibited response in RP than in CTR. This interaction in the right MFG was explained by integrating these effects into a competition model between perceptual and conceptual effects in priming processing.
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影响因子：
3.2
作者：
Chang EF;Edwards E;Nagarajan SS;Fogelson N;Dalal SS;Canolty RT;Kirsch HE;Barbaro NM;Knight RT
通讯作者：
Knight RT
影响因子：
5.7
作者：
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通讯作者：
Schröger, E
DOI：
10.1098/rstb.2005.1622
发表时间：
2005-04-29
影响因子：
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作者：
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作者：
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