Alterations in the BOLD fMRI signal with ageing and disease: A challenge for neuroimaging

Mark D’Esposito*, Leon Y. Deouell, Adam Gazzaley

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

684 Scopus citations

Abstract

Functional magnetic resonance imaging (fMRI) has rapidly emerged as a powerful tool for studying brain function, despite the fact that it measures neuronal activity indirectly, through the blood-oxygen-level-dependent (BOLD) signal. The BOLD signal depends on neurovascular coupling — the processes by which neural activity influences the haemodynamic properties of the surrounding vasculature. Although the exact mechanisms that underlie neurovascular coupling are not completely understood, there is empirical evidence that these mechanisms might be altered in normal ageing and disease. So, interpretation of BOLD fMRI studies of individuals with different ages or pathology might be more challenging than is commonly acknowledged.

Original languageAmerican English
Pages (from-to)863-872
Number of pages10
JournalNature Reviews Neuroscience
Volume4
Issue number11
DOIs
StatePublished - Nov 2003
Externally publishedYes

Bibliographical note

Funding Information:
This work was supported by the National Institutes of Health and the American Federation for Aging Research.

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