Impairment of Everyday Spatial Navigation Abilities in Mild Cognitive Impairment Is Weakly Associated with Reduced Grey Matter Volume in the Medial Part of the Entorhinal Cortex.

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  • Additional Information
    • Corporate Authors:
      Alzheimer’s Disease Neuroimaging Initiative
    • Source:
      Publisher: IOS Press Country of Publication: Netherlands NLM ID: 9814863 Publication Model: Print Cited Medium: Internet ISSN: 1875-8908 (Electronic) Linking ISSN: 13872877 NLM ISO Abbreviation: J Alzheimers Dis Subsets: MEDLINE
    • Publication Information:
      Original Publication: Amsterdam ; Washington : IOS Press, c1998-
    • Subject Terms:
      Activities of Daily Living*; Cognitive Dysfunction/*physiopathology ; Entorhinal Cortex/*diagnostic imaging ; Gray Matter/*diagnostic imaging ; Spatial Navigation/*physiology; Aged ; Aged, 80 and over ; Atrophy ; Cognitive Dysfunction/diagnostic imaging ; Cognitive Dysfunction/pathology ; Entorhinal Cortex/pathology ; Female ; Fluorodeoxyglucose F18 ; Gray Matter/pathology ; Humans ; Magnetic Resonance Imaging ; Male ; Middle Aged ; Organ Size ; Positron-Emission Tomography ; Radiopharmaceuticals
    • Abstract:
      Background: Research in rodents identified specific neuron populations encoding information for spatial navigation with particularly high density in the medial part of the entorhinal cortex (ERC), which may be homologous with Brodmann area 34 (BA34) in the human brain.
      Objective: The aim of this study was to test whether impaired spatial navigation frequently occurring in mild cognitive impairment (MCI) is specifically associated with neurodegeneration in BA34.
      Methods: The study included baseline data of MCI patients enrolled in the Alzheimer's Disease Neuroimaging Initiative with high-resolution structural MRI, brain FDG PET, and complete visuospatial ability scores of the Everyday Cognition test (VS-ECog) within 30 days of PET. A standard mask of BA34 predefined in MNI space was mapped to individual native space to determine grey matter volume and metabolic activity in BA34 on MRI and on (partial volume corrected) FDG PET, respectively. The association of the VS-ECog sum score with grey matter volume and metabolic activity in BA34, APOE4 carrier status, age, education, and global cognition (ADAS-cog-13 score) was tested by linear regression. BA28, which constitutes the lateral part of the ERC, was used as control region.
      Results: The eligibility criteria led to inclusion of 379 MCI subjects. The VS-ECog sum score was negatively correlated with grey matter volume in BA34 (β= -0.229, p = 0.022) and age (β= -0.124, p = 0.036), and was positively correlated with ADAS-cog-13 (β= 0.175, p = 0.003). None of the other predictor variables contributed significantly.
      Conclusion: Impairment of spatial navigation in MCI is weakly associated with BA34 atrophy.
    • Grant Information:
      U01 AG024904 United States AG NIA NIH HHS; Canada CIHR
    • Contributed Indexing:
      Keywords: 18F-fluorodeoxyglucose; Entorhinal cortex; grid cells; magnetic resonance imaging; mild cognitive impairment; positron emission tomography; spatial navigation; volumetry
    • Accession Number:
      0 (Radiopharmaceuticals)
      0Z5B2CJX4D (Fluorodeoxyglucose F18)
    • Publication Date:
      Date Created: 20201026 Date Completed: 20210927 Latest Revision: 20210927
    • Publication Date:
      20221213
    • Accession Number:
      10.3233/JAD-200520
    • Accession Number:
      33104026