Neural correlates of semantic competition during processing of ambiguous words.
Neural correlates of semantic competition during processing of ambiguous words.
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DOI：
10.1162/jocn.2009.21073
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发表时间：
2009-05
影响因子：
3.2
通讯作者：
Blumstein SE
中科院分区：
文献类型：
--
作者：
Bilenko NY;Grindrod CM;Myers EB;Blumstein SE
目前的研究调查了歧义词加工的神经关联以及语义竞争对该加工的潜在影响。受试者对在听觉通道中呈现的语义相关和不相关的主语-目标对进行快速词汇判断。质数或者是模棱两可的词(例如，球)，或者是明确的词(例如，运动员)，并且目标或者在语义上与模棱两可的素词(例如，足球)的主要(即，最频繁的)含义相关，或者与从属(即，较不频繁的)含义(例如，舞蹈)相关。结果显示，与明确相关的刺激对相比，模糊相关的双侧额下回(IFG)的激活增加，这表明即使在不要求参与者明确分析刺激的语义内容并在此基础上对特定含义进行公开选择的内隐任务中，额叶前区也被激活。此外，与优势意义条件相比，在左侧IFG和左侧扣带回对从属意义的激活增加，这表明为了解决在获取歧义的从属意义方面增加的竞争需求，需要招募更多的资源。
The current study investigated the neural correlates that underlie the processing of ambiguous words and the potential effects of semantic competition on that processing. Participants performed speeded lexical decisions on semantically related and unrelated prime-target pairs presented in the auditory modality. The primes were either ambiguous words (e.g., ball) or unambiguous words (e.g., athlete), and targets were either semantically related to the dominant (i.e., most frequent) meaning of the ambiguous prime word (e.g., soccer) or to the subordinate (i.e., less frequent) meaning (e.g., dance). Results showed increased activation in the bilateral inferior frontal gyrus (IFG) for ambiguous related compared to unambiguous related stimulus pairs, demonstrating that prefrontal areas are activated even in an implicit task where participants are not required to explicitly analyze the semantic content of the stimuli and to make an overt selection of a particular meaning based on this analysis. Additionally, increased activation was found in the left IFG and the left cingulate gyrus for subordinate meaning compared to dominant meaning conditions, suggesting that additional resources are recruited in order to resolve increased competition demands in accessing the subordinate meaning of an ambiguous word.
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影响因子：
16.2
作者：
Dapretto, M;Bookheimer, SY
通讯作者：
Bookheimer, SY
影响因子：
5.7
作者：
Bolla, KI;Eldreth, DA;Ernst, M
通讯作者：
Ernst, M
DOI：
10.1093/geronj/36.6.707
发表时间：
1981-01-01
期刊：
JOURNALS OF GERONTOLOGY
影响因子：
--
作者：
HOWARD, DV;MCANDREWS, MP;LASAGA, MI
通讯作者：
LASAGA, MI
影响因子：
5.7
作者：
Eickhoff, Simon B.;Heim, Stefan;Amunts, Katrin
通讯作者：
Amunts, Katrin
影响因子：
2.6
作者：
Koutstaal, W;Wagner, AD;Schacter, DL
通讯作者：
Schacter, DL