Network topology of symbolic and nonsymbolic number comparison.
Network topology of symbolic and nonsymbolic number comparison.
复制标题
符号数和非符号数比较的网络拓扑。
DOI：
10.1162/netn_a_00144
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Price,GavinR
中科院分区：
文献类型：
--
作者：
Conrad,BenjaminN;Wilkey,EricD;Yeo,DarrenJ;Price,GavinR
对数字处理过程中大脑活动的研究表明，符号和非符号数字刺激（如阿拉伯数字和点阵）涉及共享和不同的神经机制。然而，数字格式对大型功能网络组织的影响程度尚不清楚。在这项研究中，我们采用网络神经科学的方法来表征33名成年人支持符号和非符号数字比较的全脑功能结构。结果表明，两种格式的全局模块化程度相似。然而，符号格式在听觉区域中引起了更强的社区成员，而对于非符号格式，在扣谷-眼/突出网络和基底神经节社区内部和之间观察到更强的社区成员。右侧后颞下回、左侧顶叶内沟和右侧枕叶腹内侧皮层的两个区域在群体成员方面显示出不同格式的显著差异，支持了先前的发现，即这些区域基于数字格式的不同参与。此外，在非符号条件下，统一的额-顶叶/背侧注意群落在符号条件下被分解为两个组成部分。综上所述，这些结果揭示了符号和非符号数字处理的重叠和不同的网络架构模式。
Studies of brain activity during number processing suggest symbolic and nonsymbolic numerical stimuli (e.g., Arabic digits and dot arrays) engage both shared and distinct neural mechanisms. However, the extent to which number format influences large-scale functional network organization is unknown. In this study, using 7 Tesla MRI, we adopted a network neuroscience approach to characterize the whole-brain functional architecture supporting symbolic and nonsymbolic number comparison in 33 adults. Results showed the degree of global modularity was similar for both formats. The symbolic format, however, elicited stronger community membership among auditory regions, whereas for nonsymbolic, stronger membership was observed within and between cingulo-opercular/salience network and basal ganglia communities. The right posterior inferior temporal gyrus, left intraparietal sulcus, and two regions in the right ventromedial occipital cortex demonstrated robust differences between formats in terms of their community membership, supporting prior findings that these areas are differentially engaged based on number format. Furthermore, a unified fronto-parietal/dorsal attention community in the nonsymbolic condition was fractionated into two components in the symbolic condition. Taken together, these results reveal a pattern of overlapping and distinct network architectures for symbolic and nonsymbolic number processing.