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Functional networks underlying item and source memory: shared and distinct network components and age-related differences.

Publication ,  Journal Article
Monge, ZA; Stanley, ML; Geib, BR; Davis, SW; Cabeza, R
Published in: Neurobiol Aging
September 2018

Although the medial temporal lobes (MTLs) are critical for both item memory (IM) and source memory (SM), the lateral prefrontal cortex and posterior parietal cortex play a greater role during SM than IM. It is unclear, however, how these differences translate into shared and distinct IM versus SM network components and how these network components vary with age. Within a sample of younger adults (YAs; n = 15, Mage = 19.5 years) and older adults (OAs; n = 40, Mage = 68.6 years), we investigated the functional networks underlying IM and SM. Before functional MRI scanning, participants encoded nouns while making either pleasantness or size judgments. During functional MRI scanning, participants completed IM and SM retrieval tasks. We found that MTL nodes were similarly interconnected among each other during both IM and SM (shared network components) but maintained more intermodule connections during SM (distinct network components). Also, during SM, OAs (compared to YAs) had MTL nodes with more widespread connections. These findings provide a novel viewpoint on neural mechanism differences underlying IM versus SM in YAs and OAs.

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Published In

Neurobiol Aging

DOI

EISSN

1558-1497

Publication Date

September 2018

Volume

69

Start / End Page

140 / 150

Location

United States

Related Subject Headings

  • Young Adult
  • Temporal Lobe
  • Neurology & Neurosurgery
  • Neural Pathways
  • Mental Recall
  • Magnetic Resonance Imaging
  • Judgment
  • Humans
  • Brain Mapping
  • Brain
 

Citation

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ICMJE
MLA
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Monge, Z. A., Stanley, M. L., Geib, B. R., Davis, S. W., & Cabeza, R. (2018). Functional networks underlying item and source memory: shared and distinct network components and age-related differences. Neurobiol Aging, 69, 140–150. https://doi.org/10.1016/j.neurobiolaging.2018.05.016
Monge, Zachary A., Matthew L. Stanley, Benjamin R. Geib, Simon W. Davis, and Roberto Cabeza. “Functional networks underlying item and source memory: shared and distinct network components and age-related differences.Neurobiol Aging 69 (September 2018): 140–50. https://doi.org/10.1016/j.neurobiolaging.2018.05.016.
Monge ZA, Stanley ML, Geib BR, Davis SW, Cabeza R. Functional networks underlying item and source memory: shared and distinct network components and age-related differences. Neurobiol Aging. 2018 Sep;69:140–50.
Monge, Zachary A., et al. “Functional networks underlying item and source memory: shared and distinct network components and age-related differences.Neurobiol Aging, vol. 69, Sept. 2018, pp. 140–50. Pubmed, doi:10.1016/j.neurobiolaging.2018.05.016.
Monge ZA, Stanley ML, Geib BR, Davis SW, Cabeza R. Functional networks underlying item and source memory: shared and distinct network components and age-related differences. Neurobiol Aging. 2018 Sep;69:140–150.
Journal cover image

Published In

Neurobiol Aging

DOI

EISSN

1558-1497

Publication Date

September 2018

Volume

69

Start / End Page

140 / 150

Location

United States

Related Subject Headings

  • Young Adult
  • Temporal Lobe
  • Neurology & Neurosurgery
  • Neural Pathways
  • Mental Recall
  • Magnetic Resonance Imaging
  • Judgment
  • Humans
  • Brain Mapping
  • Brain