Cited by 959Memory Processes and InfluencesMemory and Neural MechanismsFunctional Brain Connectivity Studies

Coherent spontaneous activity identifies a hippocampal-parietal memory network

Vincent, Justin L., Snyder, Abraham Z., Fox, Michael D., Shannon, Benjamin J., Andrews, Jessica R., Raichle, Marcus E., Buckner, Randy L.·2006·Journal of Neurophysiology

Abstract

Despite traditional theories emphasizing parietal contributions to spatial attention and sensory-motor integration, functional MRI (fMRI) experiments in normal subjects suggest that specific regions within parietal cortex may also participate in episodic memory. Here we examined correlations in spontaneous blood-oxygenation-level-dependent (BOLD) signal fluctuations in a resting state to identify the network associated with the hippocampal formation (HF) and determine whether parietal regions were elements of that network. In the absence of task, stimuli, or explicit mnemonic demands, robust correlations were observed between activity in the HF and several parietal regions (including precuneus, posterior cingulate, retrosplenial cortex, and bilateral inferior parietal lobule). These HF-correlated regions in parietal cortex were spatially distinct from those correlated with the motion-sensitive MT+ complex. Reanalysis of event-related fMRI studies of recognition memory showed that the regions spontaneously correlated with the HF (but not MT+) were also modulated during directed recollection. These regions showed greater activity to successfully recollected items as compared with other trial types. Together, these results associate specific regions of parietal cortex that are sensitive to successful recollection with the HF.

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Crossref · 10.1152/jn.00048.2006

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  • The degree of correlation in resting state networks has been shown to be related to behavioral outcomes.

    “Activity in the different resting state networks has been linked to different functions (Laird et al., 2011) and the degree of correlation has been shown to be related to behavioral outcomes (Vincent et al., 2006) and clinical conditions (Greichius, 2008).”

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Authors
Vincent, J. L., Snyder, A. Z., Fox, M. D., Shannon, B. J., Andrews, J. R., Raichle, M. E., & Buckner, R. L.
Affiliations
Washington University in St. Louis (US)
Venue
Journal of Neurophysiology
Published
2006-12
Volume
96
Issue
6
Pages
3517-3531
ISSN
  • 0022-3077 (ISSN-L)
  • 1522-1598
OpenAlex
W2066667961
Cited by
959
References
122
Citations by year
2026: 15 · 2025: 22 · 2024: 34 · 2023: 28 · 2022: 29 · 2021: 46 · 2020: 29 · 2019: 48 · 2018: 55 · 2017: 43 · 2016: 39 · 2015: 57 · 2014: 53 · 2013: 71 · 2012: 69
FWCI
27.18
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Neurophysiology (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institute on Aging (P 50 AG05681, P50AG005681, P01 AG0 3991, P01AG003991)
  • National Institute of Neurological Disorders and Stroke (NS 06833)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory Processes and Influences
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Functional Brain Connectivity Studies
Keywords
hippocampal formation, parietal cortex, episodic memory, spontaneous neuronal activity, memory networks, precuneus, posterior cingulate cortex, retrosplenial cortex, inferior parietal lobule, recollection, recognition memory, spatial attention
MeSH terms
Adolescent, Adult, Algorithms, Brain Mapping, Cognition, Data Interpretation, Statistical, Electrophysiology, Female, Hippocampus, Humans, Functional Laterality, Magnetic Resonance Imaging, Male, Memory, Nerve Net, Oxygen, Parietal Lobe, Mental Recall

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