Neurocognitive mechanisms of digit processing and their relationship with mathematics competence.
Neurocognitive mechanisms of digit processing and their relationship with mathematics competence.
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DOI：
10.1016/j.neuroimage.2018.10.047
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发表时间：
2019-01-15
期刊：
影响因子：
5.7
通讯作者：
Price GR
中科院分区：
文献类型：
--
作者：
Pollack C;Price GR
数字加工的主导模式表明颞下回（ITG）中存在一个数字形式区（NFA），它支持阿拉伯数字作为数字的视觉符号的加工。然而，研究已经产生了不一致的证据的存在和偏侧性的数字特定的ITG活动。此外，这种活动是否与数学能力有关尚不清楚。本研究使用功能性磁共振成像来调查这两个问题。32名成年人进行了数字和字母检测任务以及阅读和数学测试。在数字检测期间，参与者确定数字是否存在于一串字母中（例如，AH 3 NR对比AHTNR）。在字母检测过程中，参与者确定字母是否存在于一串数字中（例如，93 R78对比93478）。结果显示，四个集群在额叶，枕叶，颞区的数字检测，包括左ITG集群。在额叶，顶叶，枕叶和颞叶区域的五个集群与字母检测，包括左ITG集群。数字和字母相关的ITG簇在空间上是不同的;然而，数字和字母处理的直接对比并没有表明左侧ITG在数字检测方面有更大的活动。全脑相关性显示，对于具有较高计算技能的参与者，右侧ITG的数字相关活动更大，但字母活动与计算技能之间没有相关性。总之，我们的研究结果表明，功能本地化，但不专业化，数字在左ITG和计算技能和数字处理之间的关系，在右ITG提供的第一个证据。
The dominant model of number processing suggests the existence of a Number Form Area (NFA) in the inferior temporal gyrus (ITG) that supports the processing of Arabic digits as visual symbols of number. However, studies have produced inconsistent evidence for the presence and laterality of digit-specific ITG activity. Furthermore, whether any such activity relates to mathematical competence is unknown. This study investigated these two issues using functional magnetic resonance imaging. Thirty-two adults performed digit and letter detection tasks and reading and math tests. During digit detection, participants determined whether digits were present in a string of letters (e.g., AH3NR versus AHTNR). During letter detection, participants determined whether letters were present in a string of digits (e.g., 93R78 versus 93478). Results showed four clusters in frontal, occipital, and temporal regions for digit detection, including a left ITG cluster. Five clusters in frontal, parietal, occipital, and temporal regions were associated with letter detection, including a left ITG cluster. Digit and letter-related ITG clusters were spatially distinct; however, a direct contrast of digit and letter processing did not reveal greater activity in the left ITG for digit detection. Whole brain correlations showed greater digit-related activity in the right ITG for participants with higher calculation skills, but there was no correlation between letter activity and calculation skills. Together, our results suggest functional localization, but not specialization, for digits in the left ITG and provide the first evidence of a relationship between calculation skills and digit processing in the right ITG.
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