Frequency-Dependent Cortical Interactions during Semantic Processing: An Electrocorticogram Cross-spectrum Analysis Using a Semantic Space Model

被引:5
|
作者
Sato, Naoyuki [1 ]
Matsumoto, Riki [2 ,3 ]
Shimotake, Akihiro [3 ,4 ]
Matsuhashi, Masao [4 ,5 ]
Otani, Mayumi [3 ]
Kikuchi, Takayuki [6 ]
Kunieda, Takeharu [6 ,7 ]
Mizuhara, Hiroaki [8 ]
Miyamoto, Susumu [6 ]
Takahashi, Ryosuke [3 ]
Ikeda, Akio [4 ]
机构
[1] Future Univ Hakodate, Sch Syst Informat Sci, Dept Complex & Intelligent Syst, Hakodate, Hokkaido 0418655, Japan
[2] Kobe Univ, Div Neurol, Grad Sch Med, Kobe, Hyogo 6500017, Japan
[3] Kyoto Univ, Kyoto Univ Hosp, Dept Neurol, Grad Sch Med,Sakyo Ku, Kyoto 6068507, Japan
[4] Kyoto Univ, Dept Epilepsy Movement Disorders & Physiol, Grad Sch Med, Sakyo Ku, Kyoto 6068507, Japan
[5] Kyoto Univ, Human Brain Res Ctr, Grad Sch Med, Kyoto 6068507, Japan
[6] Kyoto Univ, Kyoto Univ Hosp, Dept Neurosurg, Grad Sch Med,Sakyo Ku, Kyoto 6068507, Japan
[7] Ehime Univ, Dept Neurosurg, Grad Sch Med, Shizukawa Toon City, Ehime 7910295, Japan
[8] Kyoto Univ, Grad Sch Informat, Sakyo Ku, Kyoto 6068501, Japan
基金
日本学术振兴会;
关键词
anterior temporal lobe; distributed semantic coding; electrocorticogram; language; semantic memory; ANTERIOR TEMPORAL-LOBE; REPRESENTATION; OSCILLATIONS; OBJECT; MEMORY; ACQUISITION; SIGNALS; NORMS; SET;
D O I
10.1093/cercor/bhab089
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
Convergent evidence has demonstrated that semantics are represented by the interaction between a multimodal semantic hub at the anterior temporal lobe (ATL) and other modality-specific association cortical areas. Electrocorticogram (ECoG) recording with high spatiotemporal resolutions is efficient in evaluating such cortical interactions; however, this has not been a focus of preceding studies. The present study evaluated cortical interactions during picture naming using a novel ECoG cross-spectrum analysis, which was formulated from a computational simulation of neuronal networks and combined with a vector space model of semantics. The results clarified three types of frequency-dependent cortical networks: 1) an earlier-period (0.2-0.8 s from stimulus onset) high-gamma-band (90-150 Hz) network with a hub at the posterior fusiform gyrus, 2) a later-period (0.4-1.0 s) beta-band (15-40 Hz) network with multiple hubs at the ventral ATL and posterior middle temporal gyrus, and 3) a pre-articulation theta-band (4-7 Hz) network distributed over widely located cortical regions. These results suggest that frequency-dependent cortical interactions can characterize the underlying processes of semantic cognition, and the beta-band network with a hub at the ventral ATL is especially associated with the formation of semantic representation.
引用
收藏
页码:4329 / 4339
页数:11
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