Working Memory Load Impact on Effective Connectivity: a Dynamic Causal Modeling Study

Autor:	Jiali Huang, Chang S. Nam, Edward P. Fitts
Rok vydání:	2022
Předmět:	Medical Terminology Medical Assisting and Transcription
Zdroj:	Proceedings of the Human Factors and Ergonomics Society Annual Meeting. 66:362-366
ISSN:	1071-1813 2169-5067
DOI:	10.1177/1071181322661139
Popis:	This study aims to examine the roles of the brain regions in working memory (WM) processing and the modulatory effects of WM load. Electroencephalogram (EEG) signals were recorded when participants perform a letter-version n-back task with three different levels of WM load. The directional causal connections between brain regions were estimated using Dynamic Causal Modeling (DCM). The directions and strengths of the connections were compared for different WM load conditions. The results showed a right-lateralized, backward-only connection pattern for the high WM load condition. The results also showed changes in the roles of the brain regions when the WM load increases. These findings of the modulatory effects of WM load may be utilized in measuring cognitive states, and designing adaptive automation in augmented cognition programs.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::9572e8d7d0e9c2e70656bf07a8e78c69 https://doi.org/10.1177/1071181322661139 Zobrazit plný text záznamu