간격효과의 부호화 기전: An event-related fMRI 연구
encoding mechanisms of Spacing Effect: An event-related fMRI study
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초록
항목이 연달아 반복되는 경우(집중반복)보다 간격을 두고 반복되는 경우(간격반복) 기억 수행이 더 우수한 현상을 간격효과라 한다. 단서기억과제(재인과제)의 간격효과 및 성공적 부호화와 관련된 신경기전을 밝히기 위해 event-related fMRI연구를 수행하였는데, 부호화단계에서 단어의 반복제시 간격을 조작하고서 fMRI 영상을 구하였다. 그 결과, 재인 수행에서 전형적인 간격효과가 관찰되었고 집중반복조건에 비해 간격반복조건 뿐만 아니라 비반복조건에서 좌반구의 배외측 전두피질(DLFC), 복외측 전두피질(VLFC)의 높은 활성화가 관찰되었다. 이러한 결과는 간격효과 및 이와 관련된 성공적 부호화가 높은 수준의 주의통제와 의미적 처리에 기인한다는 것을 시사한다.
Abstract
Memory for repeated items is better if they are repeated in a spaced than in a massed fashion (Spacing effect). To investigate the neural mechanisms of spacing effect and successful encoding, lags of repetition were manipulated at encoding stage in an event-related fMRI study. The behavioral data showed typical spacing effect on recognition judgment, and greater activity for items that were repeated in a spaced fashion than for items that were repeated in a massed fashion has been observed in dorsolateral frontal cortex(DLFC) and ventrolateral frontal cortex(VLFC) of left hemisphere. These cortical regions also showed greater activity for novel items than for items that were repeated in a massed fashion. These findings suggest that spacing effect and its relevant successful encoding are attributed to higher level of attentional control and semantic processing.
참고문헌 (26)
- "Exploring the central executive", 49a, pp.5~28 (1996)
- "Brain activity that predicts how well visual experience will be remembered", pp.1185~1187 (1998)
- "A resource model of the neural basis of executive working memory", pp.3573~3578 (2000)
- "Human hippocampal neurons predict how well word pairs will be remembered", pp.289~298 (2001)
- "Spacing effects on cued-memory tests depend on level of processing Journal of Experimental Psychology", pp.389~396 (1993)
- "The neural basis of the central executive system of working memory", pp.279~281 (1995)
- "Semantic encoding and retrieval in the left inferior prefrontal cortex a functional MRI study of task difficulty and process specificity", pp.1~13 (1995)
- "Dissociating prefrontal and hippocampal function in episodic memory encoding", pp.582~585 (1997)
- "Integrated brain activity in medial temporal and prefrontal areas predicts subsequent memory performance Human declarative memory formation at the system level", pp.1~9 (2001)
- "The role of left prefrontal cortex in language and memory Proceedings of the National Academy of Sciences of the United States of America", pp.906~913 (1998)
- "Spacing effects in memory Evidence for a two-process account Journal of Experimental Psychology", pp.371~377 (1989)
- "Effects of encoding variability and spacing on frequency discrimination Journal of Memory and Language", pp.486~476 (1995)
- "PET activation of the medial temporal lobe in learning", pp.875~887 (1998)
- "Dissociating the role of the dorsolateral prefrontal and anterior cingulate cortex in cognitive control"
- "Neural correlates of successful encoding identified using functional magnetic resonance imaging Journal of Neuroscience", pp.9541~9548 (2002)
- "Toward a unified account of spacing effects in explicit cued-memory tasks Journal of Experimental Psychology", pp.819~829 (2002)
- "Revising current two-process accounts of spacing effects in memory Journal of Experimental Psychology", pp.161~172 (1998)
- "A subsequent-memory effect in dorsolateral prefrontal cortex", pp.162~166 (2003)
- "Load-dependent roles of frontal brain regions in the maintenance of working memory", pp.216~226 (1999)
- "Loss of recent memory after bilateral hippocampal lesions Journal of Neurology", pp.11~21 (1957)
- "Brain regions associated with acquisition and retrieval of verbal episodic memory", pp.633~635 (1994)
- "Storage and executive processes in the frontal lobes", pp.1657~1661 (1999)
- "Hemispheric encoding", retrieval asymmetry in episodic memory Proceedings of the National Academy of Sciences of the United States of America, 1994a, 2016~2020
- "Novelty encoding networks in the human brain", pp.2525~2528 (1994)
- "Functional anatomy of a common semantic system for words and pictures", pp.254~256 (1996)
- "Remembering and forgetting of verbal experiences as predicted by brain activity", pp.1188~1191 (1998)