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Default mode network gates the retrieval of task-irrelevant incidental memories
Umeå University, Faculty of Medicine, Department of Integrative Medical Biology (IMB), Physiology. Umeå University, Faculty of Medicine, Umeå Centre for Functional Brain Imaging (UFBI). Umeå University, Faculty of Medicine, Department of Radiation Sciences.
2011 (English)In: Neuroscience Letters, ISSN 0304-3940, E-ISSN 1872-7972, Vol. 487, no 3, 318-321 p.Article in journal (Refereed) Published
Abstract [en]

Episodic memories can be retrieved by an intentional search for certain information. Alternatively, a past episode may enter our consciousness without any intention to retrieve it, prompted by a stimulus in our surroundings. Incidental retrieval does not occur upon each encounter with a familiar stimulus, suggesting that a gating mechanism exists which regulates incidental retrieval activity. We analyzed data from a functional magnetic resonance imaging study on incidental retrieval in healthy young adults and found that failure to incidentally retrieve was selectively associated with reduced activation of lateral and medial parietal regions as well as ventromedial frontal cortex, areas implicated in default mode network. This is the first demonstration that relative deactivation of the brain regions associated with the default mode gates the consciousness from currently irrelevant memories.

Place, publisher, year, edition, pages
Elsevier, 2011. Vol. 487, no 3, 318-321 p.
Keyword [en]
Default mode network, Episodic memory, Incidental retrieval, Functional magnetic resonance imaging
National Category
Neurosciences
Identifiers
URN: urn:nbn:se:umu:diva-82328DOI: 10.1016/j.neulet.2010.10.047PubMedID: 20974213OAI: oai:DiVA.org:umu-82328DiVA: diva2:660561
Available from: 2013-10-30 Created: 2013-10-30 Last updated: 2017-12-06Bibliographically approved

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Kompus, Kristiina
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PhysiologyUmeå Centre for Functional Brain Imaging (UFBI)Department of Radiation Sciences
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