Role of Working Memory in Lexical Access: An Event-related Potential Study Based on Word-picture Matchin Tasks
FAN Rui-wen
SHI Hua-wei
HUANG Xing
DUAN Yi-wei
YAN He-ming
CHANG Jing-ling
Abstract：Objective To observe the role of working memory in the process of language, and provide an objective evaluation for Chinese language rehabilitation.Methods From December, 2017 to June, 2018, 20 healthy subjects accepted word-picture matching tasks as the word and picture showed on the different (task 1) or same (task 2) screens, and their event-related potential of N400 were compared in matched and mismatched conditions.Results Forteen subjects were included finally. Task 1 induced N400 appeared earlier with higher amplitude and more activation in central parietal occipital region, followed larger N170 and P1 wave. There were significant differences in most cerebral regions between the two tasks in N400 amplitude difference of matched and mismatched conditions (t＞ 2.319, P ＜ 0.05).Conclusion Word-picture matching tasks may involve more language-related brain regions with the intervention of working memory, that might work better in process of vocabulary. The tasks simulating the scene of Chinese language rehabilitation can be used as an objective evaluation for clinical activities.
Keywords：language rehabilitationlexical accessworking memoryevent-related potentialsN400
Publication Date：2019-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 70-75 )