Hippocampus's role in forming "task-related" associations: Flashing to the things you are looking for

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	Hippocampus's role in forming "task-related" associations: Flashing to the things you are looking for
	Zhang XiuLing 1; Kazuhisa, Niki 2,3; Luo Jing1 ; J. Luo
摘要	Eichenbaum and colleagues observed that the same place did or did not activate the "goal-approach" cells in hippocampus depending on whether the place was the way for rats to approach specific goal. Parallel with this, the present neuroimage study revealed that, the same type of items could activate the hippocampus more when it was related to the task at hand than when it not. Participants were scanned by fMRI while they made judgments on the type of relationships contained in the word-pairs (e.g., Does the word pair, "furniture-table", contain a "category-exemplar" relationship?). Event-related analysis revealed that the forming of "task-related" association activated hippocampus more than that of "task-unrelated", even if it was the same type of items, and, this hippocampal difference was not caused by the different judgment requirements, nor by the effects of "yes" response. Consistently, the post-judgment cued-recall test exhibited a better retrieval performance for "task-related" associations than for the same type but "task-unrelated" associations. Results also showed that, the semantic relatedness between the to-be-associated individual words (e.g., the related word pair "healthy-hospital" versus the unrelated word pair "price-way") was not enough to activate the hippocampus when it was "task-unrelated". Generally, we proposed that, through participating in forming of "task-related" associations and consolidating of episodic memory, hippocampus enabled the organism to keep the information that owned great survival values in mind for future usage.; Eichenbaum and colleagues observed that the same place did or did not activate the "goal-approach" cells in hippocampus depending on whether the place was the way for rats to approach specific goal. Parallel with this, the present neuroimage study revealed that, the same type of items could activate the hippocampus more when it was related to the task at hand than when it not. Participants were scanned by fMRI while they made judgments on the type of relationships contained in the word-pairs (e.g., Does the word pair, "furniture-table", contain a "category-exemplar" relationship?). Event-related analysis revealed that the forming of "task-related" association activated hippocampus more than that of "task-unrelated", even if it was the same type of items, and, this hippocampal difference was not caused by the different judgment requirements, nor by the effects of "yes" response. Consistently, the post-judgment cued-recall test exhibited a better retrieval performance for "task-related" associations than for the same type but "task-unrelated" associations. Results also showed that, the semantic relatedness between the to-be-associated individual words (e.g., the related word pair "healthy-hospital" versus the unrelated word pair "price-way") was not enough to activate the hippocampus when it was "task-unrelated". Generally, we proposed that, through participating in forming of "task-related" associations and consolidating of episodic memory, hippocampus enabled the organism to keep the information that owned great survival values in mind for future usage.
关键词	event-related fMRI hippocampus "task-related" associations semantic relatedness
学科领域	认知神经科学
	2008-08-01
语种	英语
发表期刊	CHINESE SCIENCE BULLETIN
ISSN	1001-6538
卷号	53 期号:16 页码:2496-2505
期刊论文类型	Article
收录类别	SCI
WOS记录号	WOS:000258528600012
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.psych.ac.cn/handle/311026/5449
专题	中国科学院心理研究所回溯数据库(1956-2010)
通讯作者	J. Luo
作者单位	1.Chinese Acad Sci, Inst Psychol, Key Lab Mental Hlth, Beijing 100101, Peoples R China 2.Natl Inst Adv Ind Sci & Technol, Neurosci Res Inst, Tokyo, Japan 3.JST, RISTEX, Tokyo, Japan
第一作者单位	中国科学院心理健康重点实验室
推荐引用方式 GB/T 7714	Zhang XiuLing,Kazuhisa, Niki,Luo Jing,et al. Hippocampus's role in forming "task-related" associations: Flashing to the things you are looking for[J]. CHINESE SCIENCE BULLETIN,2008,53(16):2496-2505.
APA	Zhang XiuLing,Kazuhisa, Niki,Luo Jing,&J. Luo.(2008).Hippocampus's role in forming "task-related" associations: Flashing to the things you are looking for.CHINESE SCIENCE BULLETIN,53(16),2496-2505.
MLA	Zhang XiuLing,et al."Hippocampus's role in forming "task-related" associations: Flashing to the things you are looking for".CHINESE SCIENCE BULLETIN 53.16(2008):2496-2505.

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