オノ　ユミエ   ONO YUMIE   小野　弓絵    所属   明治大学  理工学部    職種   専任教授
言語種別	英語
発行・発表の年月	2019/01
形態種別	学術雑誌
査読	査読あり
標題	Utilization of the Frontoparietal Cortical Network Determines Individual Differences in Working Memory Capacity
執筆形態	共著(筆頭者以外)
掲載誌名	Advanced Biomedical Engineering
掲載区分	国外
出版社・発行元	Japanese Society for Medical and Biological Engineering
巻・号・頁	8,pp.23-29
著者・共著者	H. S. Gan, T. Suzuki, K. Yokosawa, Y. Ono
概要	Individual capacity of recall memory varies greatly, even in healthy young adults. Nevertheless, the difference in brain circuitry underlying varied memory capacity has yet to be fully investigated. We acquired electroencephalographic meas-urements of 43 healthy young adults who performed a demanding working memory task and studied the changes in re-gional cortical activity in relation to different memory performances. The memory task involved the sequential presenta-tion of seven arrow pictures to encode and the participants were required to report the direction of one of the arrows in the sequence within the retrieval period. We divided the participants into three groups of high-, intermediate-, and low-performance based on the weighted hierarchical grouping method. Regional brain activities were source-localized using the multiple sparse priors method in the high- and low-performance groups and group differences were determined by non-parametric permutation tests. Our findings showed that participants with higher memory performance exhibited wider distribution of cortical activity including the prefrontal and parieto-posterior cortices whereas lower performance participants only exhibited stable activations across occipital regions. The results implied the importance of selective attention in order to attain optimal individual working memory performance. Furthermore, we suggest the potential role of the angular gyrus as an interplay between the prefrontal and posterior regions for the management of stimulus flow and signal control. Future works shall focus on conducting more thorough connectivity analysis to investigate the relationship of cortical activations related to individual working memory performance.
researchmap用URL	https://doi.org/10.14326/abe.8.23