Neuropsychology Review

, 19:415

Cerebral White Matter Integrity and Cognitive Aging: Contributions from Diffusion Tensor Imaging

  • David J. Madden
  • Ilana J. Bennett
  • Allen W. Song
Review

DOI: 10.1007/s11065-009-9113-2

Cite this article as:
Madden, D.J., Bennett, I.J. & Song, A.W. Neuropsychol Rev (2009) 19: 415. doi:10.1007/s11065-009-9113-2

Abstract

The integrity of cerebral white matter is critical for efficient cognitive functioning, but little is known regarding the role of white matter integrity in age-related differences in cognition. Diffusion tensor imaging (DTI) measures the directional displacement of molecular water and as a result can characterize the properties of white matter that combine to restrict diffusivity in a spatially coherent manner. This review considers DTI studies of aging and their implications for understanding adult age differences in cognitive performance. Decline in white matter integrity contributes to a disconnection among distributed neural systems, with a consistent effect on perceptual speed and executive functioning. The relation between white matter integrity and cognition varies across brain regions, with some evidence suggesting that age-related effects exhibit an anterior–posterior gradient. With continued improvements in spatial resolution and integration with functional brain imaging, DTI holds considerable promise, both for theories of cognitive aging and for translational application.

Keywords

Diffusion tensor imaging White matter Cognition Aging Information processing Human development 

Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • David J. Madden
    • 1
    • 3
    • 4
  • Ilana J. Bennett
    • 2
  • Allen W. Song
    • 3
  1. 1.Center for the Study of Aging and Human DevelopmentDuke University Medical CenterDurhamUSA
  2. 2.Department of PsychologyGeorgetown UniversityWashingtonUSA
  3. 3.Brain Imaging and Analysis CenterDuke University Medical CenterDurhamUSA
  4. 4.DurhamUSA