Semantic and Perceptual Processing of Number Symbols: Evidence from a Cross-linguistic fMRI Adaptation Study
Semantic and Perceptual Processing of Number Symbols: Evidence from a Cross-linguistic fMRI Adaptation Study
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DOI：
10.1162/jocn_a_00323
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发表时间：
2013-03-01
影响因子：
3.2
通讯作者：
Ansari, Daniel
中科院分区：
文献类型：
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作者：
Holloway, Ian D.;Battista, Christian;Ansari, Daniel
许多动物物种都具有处理一组项目的数值大小的能力。神经成像数据已经将这种能力与表示非符号数值幅度（例如，点的阵列）在双侧顶叶中具有活动。然而，人类的定量能力并不局限于处理非符号集合的数值大小。人类已经使用这种数量意义作为表示数值大小的符号系统的基础。虽然数字符号的使用在人类文化中很普遍，但涉及数字符号处理的大脑区域才刚刚开始被理解。在这里，我们研究了数字符号的语义和感知处理的大脑区域。具体来说，我们使用了功能磁共振成像适应范式，以检查神经反应的印度阿拉伯数字和中国数字表意文字在一组中国读者谁可以阅读这两种符号类型和控制组谁可以只读数字。在各组中，印度-阿拉伯数字在左侧IPS中表现出比率依赖性调制。与此相反，数字表意文字与激活的权利IPS，专门在中国读者。此外，数字和象形文字的视觉相似性的处理与左梭状回的激活。使用文化作为一个独立的变量，我们提供了明确的证据，在与数字符号的语义和感知处理的大脑区域的差异。此外，我们揭示了一个显着的差异，顶叶激活的偏侧性之间的语义处理的两种符号类型。
The ability to process the numerical magnitude of sets of items has been characterized in many animal species. Neuroimaging data have associated this ability to represent nonsymbolic numerical magnitudes (e.g., arrays of dots) with activity in the bilateral parietal lobes. Yet the quantitative abilities of humans are not limited to processing the numerical magnitude of nonsymbolic sets. Humans have used this quantitative sense as the foundation for symbolic systems for the representation of numerical magnitude. Although numerical symbol use is widespread in human cultures, the brain regions involved in processing of numerical symbols are just beginning to be understood. Here, we investigated the brain regions underlying the semantic and perceptual processing of numerical symbols. Specifically, we used an fMRI adaptation paradigm to examine the neural response to Hindu-Arabic numerals and Chinese numerical ideographs in a group of Chinese readers who could read both symbol types and a control group who could read only the numerals. Across groups, the Hindu-Arabic numerals exhibited ratio-dependent modulation in the left IPS. In contrast, numerical ideographs were associated with activation in the right IPS, exclusively in the Chinese readers. Furthermore, processing of the visual similarity of both digits and ideographs was associated with activation of the left fusiform gyrus. Using culture as an independent variable, we provide clear evidence for differences in the brain regions associated with the semantic and perceptual processing of numerical symbols. Additionally, we reveal a striking difference in the laterality of parietal activation between the semantic processing of the two symbols types.