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Aging-Related Dissociation of Spatial and Temporal N400 in Sentence-Level Semantic Processing: Evidence From Source Analyses
- Title
- Aging-Related Dissociation of Spatial and Temporal N400 in Sentence-Level Semantic Processing: Evidence From Source Analyses
- Authors
- An, Sora; Oh, Se Jin; Jun, Sang Beom; Sung, Jee Eun
- Ewha Authors
- 성지은; 전상범; 안소라
- SCOPUS Author ID
- 성지은; 전상범; 안소라
- Issue Date
- 2022
- Journal Title
- FRONTIERS IN AGING NEUROSCIENCE
- ISSN
- 1663-4365
- Citation
- FRONTIERS IN AGING NEUROSCIENCE vol. 14
- Keywords
- aging; sentence processing; semantic processing; event-related potential; source analysis; brain network
- Publisher
- FRONTIERS MEDIA SA
- Indexed
- SCIE; SCOPUS
- Document Type
- Article
- Abstract
- Age-related differences in sentence-level lexical-semantic processes have been extensively studied, based on the N400 component of event-related potential (ERP). However, there is still a lack of understanding in this regard at the brain-region level. This study explores aging effects on sentence-level semantic processing by comparing the characteristics of the N400 ERP component and brain engagement patterns within individual N400 time windows for two age groups (16 younger adults aged 24.38 +/- 3.88 years and 15 older adults aged 67.00 +/- 5.04 years) during sentence processing with different plausibility conditions. Our results demonstrated that the N400 effect according to the plausibility condition occurred in different temporal windows in the two age groups, with a delay in the older group. Moreover, it was identified that there was a distinct difference between the groups in terms of the source location of the condition-dependent N400 effect even though no significant difference was derived in its magnitude itself at the sensor-level. Interestingly, the source analysis results indicated that the two groups involved different functional networks to resolve the same semantic violations: the younger group activated the regions corresponding to the typical lexical-semantic network more, whereas the older group recruited the regions belonging to the multiple-demand network more. The findings of this study could be used as a basis for understanding the aging brain in a linguistic context.
- DOI
- 10.3389/fnagi.2022.877235
- Appears in Collections:
- 사범대학 > 언어병리학과 > Journal papers
- Files in This Item:
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