Individual differences in encoded neural representations within cortical speech production network
Individual differences in encoded neural representations within cortical speech production network
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皮质语音产生网络中编码神经表示的个体差异
DOI：
10.1016/j.brainres.2019.146483
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发表时间：
2020
期刊：
影响因子：
2.9
通讯作者：
Kraemer, David J.M.
中科院分区：
文献类型：
--
作者：
Alfred, Katherine L.;Hayes, Justin C.;Pizzie, Rachel G.;Cetron, Joshua S.;Kraemer, David J.M.
当两个人看同一件物品时，他们不一定以相同的方式感知该物品。如果一个人看到一个稍后要回忆的刺激，那么被编码的信息取决于他所看到的刺激的特征。过去的研究表明，在群体层面上，语言和视觉信息（如文字和图片）是在大脑的不同区域编码的。然而，这种说法混淆了外部和内部的表征格式，也忽略了注意力的个体差异。在这项研究中，我们研究了与个体对言语表征的注意差异相关的神经和行为模式——包括外部和内部。我们发现语义内容（有意义的单词和图片）的编码神经表征作为言语注意个体差异的函数而变化，独立于刺激呈现格式。在编码物体名称和编码物体图片时，对单词表现出注意偏向的个体在优先语音产生网络中表现出相似的多元BOLD活动模式。这一结果表明，这些人对文字和图片都进行了口头编码。这些影响在非语义刺激（可发音的非单词和无意义的图片）中没有发现。重要的是，正如预期的那样，在已知独立于格式处理语义内容的单独区域网络中，没有发现神经表征的个体差异。这些结果突出了编码语义内容的内部表示中个体间的差异和收敛。意义声明：本研究显示了注意单词表征的倾向与编码神经表征的个体差异之间的关系。有选择地关注文字而不是图片的人，不管这些信息最初是以文字还是图片的形式呈现的，都会在大脑的语言区域处理语义上有意义的信息。尽管所有的参与者都在表达领域一般语义信息的区域对单词和图片进行了类似的编码，但只有那些倾向于单词表示的个体在情态特定的语言区域对单词和图片进行了额外的处理。这些结果表明，在有意义的信息编码过程中，个体之间既存在趋同，也存在分化。
When two individuals view the same item, they do not necessarily perceive an item in the same way. If an individual is presented with a stimulus to be recalled later, the information that is encoded is dependent on the features of the stimulus to which one attends. Past studies have shown that, on the group level, verbal and visual information (e.g., words and pictures) are encoded in disparate regions of the brain. However, this account conflates external and internal representational formats, and it also neglects individual differences in attention. In this study, we examined neural and behavioral patterns associated with individual differences in attention to verbal representations—both external and internal. We found that the encoded neural representation of semantic content (meaningful words and pictures) varied as a function of individual differences in verbal attention, independent of the stimulus presentation format. Individuals who demonstrated an attentional bias toward words showed similar multivariate BOLD activity patterns within ana priorispeech production network when encoding object names as when encoding pictures of objects. This result indicates that these individuals encode both words and pictures verbally. These effects were not found for non-semantic stimuli (pronounceable non-words and nonsense pictures). Importantly, as expected, no individual differences in neural representation were found in a separate network of regions known to process semantic content independent of format. These results highlight inter-individual divergence and convergence in internal representations of encoded semantic content.Significance StatementThis study shows how tendencies to attend to word representations is associated with individual differences in encoded neural representations. Individuals who selectively attend to words instead of pictures process semantically meaningful information in language regions of the brain, regardless of whether the information was originally presented as a word or a picture. Though all participants encoded words and pictures similarly in regions that are known to represent domain-general semantic information, only the individuals who were biased towards word representations additionally processed both words and pictures in modality-specific verbal regions. These results demonstrate both the convergence and divergence between individuals that occurs during encoding of meaningful information.
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影响因子：
2
作者：
Ardila, A
通讯作者：
Ardila, A
影响因子：
2.9
作者：
Schomers MR;Pulvermüller F
通讯作者：
Pulvermüller F
DOI：
10.1186/1744-9081-9-28
发表时间：
2013-07-24
期刊：
Behavioral and brain functions : BBF
影响因子：
--
作者：
Zarnhofer S;Braunstein V;Ebner F;Koschutnig K;Neuper C;Ninaus M;Reishofer G;Ischebeck A
通讯作者：
Ischebeck A
影响因子：
2.4
作者：
Meissner, CA;Brigham, JC
通讯作者：
Brigham, JC
DOI：
--
发表时间：
1998
期刊：
影响因子：
--
作者：
Robert S. Ryan;J. Schooler
通讯作者：
J. Schooler