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Relationship between structural and functional connectivity change across the adult lifespan: A longitudinal investigation.
- Source :
-
Human brain mapping [Hum Brain Mapp] 2017 Jan; Vol. 38 (1), pp. 561-573. Date of Electronic Publication: 2016 Sep 22. - Publication Year :
- 2017
-
Abstract
- Extensive efforts are devoted to understand the functional (FC) and structural connections (SC) of the brain. FC is usually measured by functional magnetic resonance imaging (fMRI), and conceptualized as degree of synchronicity in brain activity between different regions. SC is typically indexed by measures of white matter (WM) properties, for example, by diffusion weighted imaging (DWI). FC and SC are intrinsically related, in that coordination of activity across regions ultimately depends on fast and efficient transfer of information made possible by structural connections. Convergence between FC and SC has been shown for specific networks, especially the default mode network (DMN). However, it is not known to what degree FC is constrained by major WM tracts and whether FC and SC change together over time. Here, 120 participants (20-85 years) were tested at two time points, separated by 3.3 years. Resting-state fMRI was used to measure FC, and DWI to measure WM microstructure as an index of SC. TRACULA, part of FreeSurfer, was used for automated tractography of 18 major WM tracts. Cortical regions with tight structural couplings defined by tractography were only weakly related at the functional level. Certain regions of the DMN showed a modest relationship between change in FC and SC, but for the most part, the two measures changed independently. The main conclusions are that anatomical alignment of SC and FC seems restricted to specific networks and tracts, and that changes in SC and FC are not necessarily strongly correlated. Hum Brain Mapp 38:561-573, 2017. © 2016 Wiley Periodicals, Inc.<br />Competing Interests: The authors declare no competing financial interests.<br /> (© 2016 Wiley Periodicals, Inc.)
- Subjects :
- Adult
Age Factors
Aged
Aged, 80 and over
Brain Mapping
Diffusion Magnetic Resonance Imaging
Female
Humans
Image Processing, Computer-Assisted
Longitudinal Studies
Magnetic Resonance Imaging
Male
Mental Status Schedule
Middle Aged
Oxygen blood
Rest
Young Adult
Aging physiology
Brain diagnostic imaging
Brain physiology
Models, Neurological
Neural Pathways diagnostic imaging
Neural Pathways physiology
Subjects
Details
- Language :
- English
- ISSN :
- 1097-0193
- Volume :
- 38
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- Human brain mapping
- Publication Type :
- Academic Journal
- Accession number :
- 27654880
- Full Text :
- https://doi.org/10.1002/hbm.23403