Semantic properties of words: Establishing their temporal and spatial correlates in the brain

单词的语义属性：在大脑中建立它们的时间和空间关联

• 批准号: 2187868
• 金额: --
• 依托单位: University of Glasgow
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2018
• 资助国家: 英国
• 起止时间: 2018 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2187868
• 关键词: Semantic; properties; words; Establishing; their

Recognising written words, an essential part of reading, is subjectively effortless and objectively fast. While it is well-established that readers are highly proficient in the semantic interpretation of written information, debate and enquiry continues to surround the precise time course of word recognition, its neural substrates, and the extent to which semantic factors can modulate these processes. The current proposal investigates the temporal and spatial correlates of processing the semantic features of words, including their emotionality (arousal, valence, dominance), visualisation (concreteness, imageability), salience (semantic size, gendered association), and subjective frequency (familiarity, ageof acquisition). Brain imaging techniques capable of capturing the temporal and spatial contingencies of word recognition processes are utilised across a series of experiments. First, in a large-scale word recognition task using simultaneous electroencephalography (EEG) and magnetoencephalography (MEG) recording, the relative timing and strength of activations associated with different semantic dimensions will be assessed. Second, in two studies using functional magnetic resonance imaging (fMRI), the contribution of brain regions specific to the processing of words' emotionality and semantic size will be evaluated. It is expected that the findings will provide novel insights into the semanticprocessing of words and will inform and constrain current models of word recognition in reading.The research will be the first study of its kind to examine precise temporal and spatial components of processing multiple semantic dimensions of words. The EEG-MEG and fMRI experiments complement each other in identifying components associated with words varying across multiple semantic dimensions. It is expected that the findings will establish the contributions of semantic features to word recognition, and will help delineate the differences between individual features. This will in turn inform models of the neural circuitry associated with automatic recognition of words. Although humans are capable of rapid word recognition with minimal effort, much remains unknown as to how this is achieved. The combined findings from large, multidimensional EEG-MEG and more focussed fMRI studies will allow for identification of both the temporal and spatial properties of components associated with various semantic features of words, establishing the 'when' and 'where' of semantic feature integration during word recognition.

识别书面文字是阅读的重要组成部分，主观上毫不费力，客观上快速。虽然它是公认的，读者是高度熟练的书面信息的语义解释，辩论和查询继续围绕精确的时间过程中的单词识别，其神经基板，以及在何种程度上语义因素可以调节这些过程。目前的建议调查的时间和空间的相关性处理的语义特征的话，包括他们的情感（唤醒，效价，优势），可视化（具体性，形象），显着性（语义大小，性别协会），和主观频率（熟悉，年龄收购）。大脑成像技术能够捕捉到的时间和空间的偶然性的单词识别过程中使用了一系列的实验。首先，在一个大规模的单词识别任务，同时使用脑电图（EEG）和脑磁图（MEG）记录，与不同的语义维度相关的激活的相对时间和强度进行评估。其次，在两项使用功能性磁共振成像（fMRI）的研究中，将评估大脑区域对单词情感性和语义大小处理的贡献。本研究的发现有望为词汇语义加工提供新的视角，并为当前阅读中的词汇识别模型提供信息和约束。本研究将是同类研究中第一个检验词汇多个语义维度加工的精确时间和空间成分的研究。EEG-MEG和fMRI实验在识别与多个语义维度不同的单词相关的成分方面相互补充。预计这些发现将确定语义特征对单词识别的贡献，并有助于描述个体特征之间的差异。这将反过来为与自动识别单词相关的神经回路模型提供信息。虽然人类能够以最小的努力快速识别单词，但对于如何实现这一点仍然未知。从大型的，多维的脑电图-脑磁图和更集中的功能磁共振成像研究的综合结果将允许识别的时间和空间属性的组件与各种语义特征的话，建立“何时”和“何地”的语义特征整合在单词识别。