How the intrinsic functional connectivity patterns of the semantic network support semantic processing

被引:3
作者
Huang, Chengmei [1 ,2 ,3 ]
Li, Aqian [1 ,2 ,3 ]
Pang, Yingdan [1 ,2 ,3 ]
Yang, Jiayi [1 ,2 ,3 ]
Zhang, Jingxian [1 ,2 ,3 ]
Wu, Xiaoyan [1 ,2 ,3 ]
Mei, Leilei [1 ]
机构
[1] South China Normal Univ, Philosophy & Social Sci Lab Reading & Dev Children, Minist Educ, Guangzhou 510631, Peoples R China
[2] South China Normal Univ, Sch Psychol, Guangzhou 510631, Peoples R China
[3] South China Normal Univ, Ctr Studies Psychol Applicat, Guangzhou 510631, Peoples R China
基金
中国国家自然科学基金;
关键词
Within-network connectivity; Between-network connectivity; Semantic processing; Semantic network; Resting-state fMRI; INFERIOR FRONTAL GYRUS; ANTERIOR TEMPORAL-LOBE; NIH TOOLBOX; HUMAN BRAIN; ANGULAR GYRUS; GLOBAL CONNECTIVITY; COGNITION BATTERY; ANALYSIS REVEALS; FACE; REGIONS;
D O I
10.1007/s11682-024-00849-y
中图分类号
R445 [影像诊断学];
学科分类号
100207 ;
摘要
Semantic processing, a core of language comprehension, involves the activation of brain regions dispersed extensively across the frontal, temporal, and parietal cortices that compose the semantic network. To comprehend the functional structure of this semantic network and how it prepares for semantic processing, we investigated its intrinsic functional connectivity (FC) and the relation between this pattern and semantic processing ability in a large sample from the Human Connectome Project (HCP) dataset. We first defined a well-studied brain network for semantic processing, and then we characterized the within-network connectivity (WNC) and the between-network connectivity (BNC) within this network using a voxel-based global brain connectivity (GBC) method based on resting-state functional magnetic resonance imaging (fMRI). The results showed that 97.73% of the voxels in the semantic network displayed considerably greater WNC than BNC, demonstrating that the semantic network is a fairly encapsulated network. Moreover, multiple connector hubs in the semantic network were identified after applying the criterion of WNC > 1 SD above the mean WNC of the semantic network. More importantly, three of these connector hubs (i.e., the left anterior temporal lobe, angular gyrus, and orbital part of the inferior frontal gyrus) were reliably associated with semantic processing ability. Our findings suggest that the three identified regions use WNC as the central mechanism for supporting semantic processing and that task-independent spontaneous connectivity in the semantic network is essential for semantic processing.
引用
收藏
页码:539 / 554
页数:16
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