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阿部准教授の論文が『Experimental Brain Research』に掲載されました

1603abe_EBR.png 阿部修士准教授(上廣こころ学研究部門)の論文が、『Experimental Brain Research』に掲載されました。
 ヒトを対象としたエピソード記憶の研究では、source memory とよばれる情報源の記憶(例:ある話を誰から聞いたか)についての研究が盛んにおこなわれてきました。近年では destination memory とよばれる伝達先の記憶(例:ある情報を誰に話したか)についての研究もおこなわれるようになり、両者の異同について議論がなされています。
 今回の fMRI を用いた研究では、destination memory の神経基盤にアプローチし、内側側頭葉と destination memory との関連を明らかにしました。


Mugikura S, Abe N, Ito A, Kawasaki I, Ueno A, Takahashi S, Fujii T (2016)
Medial temporal lobe activity associated with the successful retrieval of destination memory
Experimental Brain Research 234: 95-104
http://link.springer.com/article/10.1007/s00221-015-4415-5 ※認証有り


○Abstract
Destination memory is the process of remembering to whom we tell particular things. Although recent behavioral studies have clarified the cognitive nature of destination memory, the neural mechanisms underlying destination memory retrieval remain unclear. We used functional magnetic resonance imaging (fMRI) to determine whether the medial temporal lobe (MTL), a structure that has been implicated in recollection-based memory, is activated during the successful retrieval of destination information. During a study phase before fMRI scanning, the subjects told a series of facts to either a woman or a man. During fMRI scanning, the subjects were asked to judge whether each fact presented was old or new, and if they judged it as old, to indicate, including a confidence rating (high or low), whether the subjects had told that fact to either a man or a woman. We found that successful destination retrieval, when compared to failed destination retrieval, was associated with increased activity in the parahippocampal gyrus. We also found that the confidence level (high vs. low) for destination memory retrieval was associated with increased activity in another (posterior) region of the parahippocampal gyrus. The present study suggests that the successful retrieval of destination information depends highly on MTL-mediated recollection processes.