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Offline Memory Reprocessing: Involvement of the Brain's Default Network in Spontaneous Thought Processes
BACKGROUND: Spontaneous thought processes (STPs), also called daydreaming or mind-wandering, occur ubiquitously in daily life. However, the functional significance of STPs remains largely unknown. METHODOLOGY/PRINCIPAL FINDING: Using functional magnetic resonance imaging (fMRI), we first identified...
Autores principales: | , , , , , , |
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Formato: | Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2009
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2653727/ https://www.ncbi.nlm.nih.gov/pubmed/19290044 http://dx.doi.org/10.1371/journal.pone.0004867 |
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author | Wang, Kun Yu, Chunshui Xu, Lijuan Qin, Wen Li, Kuncheng Xu, Lin Jiang, Tianzi |
author_facet | Wang, Kun Yu, Chunshui Xu, Lijuan Qin, Wen Li, Kuncheng Xu, Lin Jiang, Tianzi |
author_sort | Wang, Kun |
collection | PubMed |
description | BACKGROUND: Spontaneous thought processes (STPs), also called daydreaming or mind-wandering, occur ubiquitously in daily life. However, the functional significance of STPs remains largely unknown. METHODOLOGY/PRINCIPAL FINDING: Using functional magnetic resonance imaging (fMRI), we first identified an STPs-network whose activity was positively correlated with the subjects' tendency of having STPs during a task-free state. The STPs-network was then found to be strongly associated with the default network, which has previously been established as being active during the task-free state. Interestingly, we found that offline reprocessing of previously memorized information further increased the activity of the STPs-network regions, although during a state with less STPs. In addition, we found that the STPs-network kept a dynamic balance between functional integration and functional separation among its component regions to execute offline memory reprocessing in STPs. CONCLUSION/SIGNIFICANCE: These findings strengthen a view that offline memory reprocessing and STPs share the brain's default network, and thus implicate that offline memory reprocessing may be a predetermined function of STPs. This supports the perspective that memory can be consolidated and modified during STPs, and thus gives rise to a dynamic behavior dependent on both previous external and internal experiences. |
format | Text |
id | pubmed-2653727 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2009 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-26537272009-03-17 Offline Memory Reprocessing: Involvement of the Brain's Default Network in Spontaneous Thought Processes Wang, Kun Yu, Chunshui Xu, Lijuan Qin, Wen Li, Kuncheng Xu, Lin Jiang, Tianzi PLoS One Research Article BACKGROUND: Spontaneous thought processes (STPs), also called daydreaming or mind-wandering, occur ubiquitously in daily life. However, the functional significance of STPs remains largely unknown. METHODOLOGY/PRINCIPAL FINDING: Using functional magnetic resonance imaging (fMRI), we first identified an STPs-network whose activity was positively correlated with the subjects' tendency of having STPs during a task-free state. The STPs-network was then found to be strongly associated with the default network, which has previously been established as being active during the task-free state. Interestingly, we found that offline reprocessing of previously memorized information further increased the activity of the STPs-network regions, although during a state with less STPs. In addition, we found that the STPs-network kept a dynamic balance between functional integration and functional separation among its component regions to execute offline memory reprocessing in STPs. CONCLUSION/SIGNIFICANCE: These findings strengthen a view that offline memory reprocessing and STPs share the brain's default network, and thus implicate that offline memory reprocessing may be a predetermined function of STPs. This supports the perspective that memory can be consolidated and modified during STPs, and thus gives rise to a dynamic behavior dependent on both previous external and internal experiences. Public Library of Science 2009-03-17 /pmc/articles/PMC2653727/ /pubmed/19290044 http://dx.doi.org/10.1371/journal.pone.0004867 Text en Wang et al. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited. |
spellingShingle | Research Article Wang, Kun Yu, Chunshui Xu, Lijuan Qin, Wen Li, Kuncheng Xu, Lin Jiang, Tianzi Offline Memory Reprocessing: Involvement of the Brain's Default Network in Spontaneous Thought Processes |
title | Offline Memory Reprocessing: Involvement of the Brain's Default Network in Spontaneous Thought Processes |
title_full | Offline Memory Reprocessing: Involvement of the Brain's Default Network in Spontaneous Thought Processes |
title_fullStr | Offline Memory Reprocessing: Involvement of the Brain's Default Network in Spontaneous Thought Processes |
title_full_unstemmed | Offline Memory Reprocessing: Involvement of the Brain's Default Network in Spontaneous Thought Processes |
title_short | Offline Memory Reprocessing: Involvement of the Brain's Default Network in Spontaneous Thought Processes |
title_sort | offline memory reprocessing: involvement of the brain's default network in spontaneous thought processes |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2653727/ https://www.ncbi.nlm.nih.gov/pubmed/19290044 http://dx.doi.org/10.1371/journal.pone.0004867 |
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