The associative-semantic network for words and pictures: Effective connectivity and graph analysis  

Oleh:

Vandenberghe, Rik ; Wang, Yu ; Nelissen, Natalie ; Vandenbulcke, Mathieu ; Dhollander, Thijs ; Sunaert, Stefan ; Dupont, Patrick

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: Brain and Language (Full Text) vol. 127 no. 2 (2013), page 264-272.
Topik: Semantic; Language; Lexical; Visual word form area; FMRI; Effective connectivity
Fulltext: 127_02_Vandenberghe.pdf (1.06MB)

Isi artikel

Explicit associative-semantic processing of words and pictures activates a distributed set of brain areas that has been replicated across a wide range of studies. We applied graph analysis to examine the structure of this network. We determined how the left ventral occipitotemporal transition zone (vOT) was connected to word-specific areas. A modularity analysis discerned four communities: one corresponded to the classical perisylvian language system, including superior temporal sulcus (STS), middle temporal gyrus (GTm) and pars triangularis of the inferior frontal gyrus (GFi), among other nodes. A second subsystem consisted of vOT and anterior fusiform gyrus along with hippocampus and intraparietal sulcus. The two subsystems were linked through a unique connection between vOT and GTm, which were hubs with a high betweenness centrality compared to STS and GFi which had a high local clustering coefficient. Graph analysis reveals novel insights into the structure of the network for associative-semantic processing.

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