Key result
Longitudinal fMRI offers the potential to track brain plasticity, adaptation, and repair in evolving multiple sclerosis and monitor responses to disease-modifying therapies or rehabilitation.
This review highlights the potential of longitudinal fMRI to track disease evolution, adaptation, and repair mechanisms in multiple sclerosis, overcoming limitations of cross-sectional designs.
Longitudinal fMRI may support MS monitoring and therapy assessment; leaves open routine adoption pending prospective validation.
Functional magnetic resonance imaging (fMRI) has greatly advanced our understanding of cerebral functional changes occurring in patients with multiple sclerosis (MS). However, most of our knowledge regarding brain plasticity and repair in MS as evidenced by fMRI has been extrapolated from cross-sectional studies across different phenotypes of the disease. This topical review provides an overview of this research, but also highlights limitations of existing fMRI studies with cross-sectional design. We then review the few existing longitudinal fMRI studies and discuss the feasibility and constraints of serial fMRI in individuals with MS. We further emphasize the potential to track fMRI changes in evolving disease and the insights this may give in terms of mechanisms of adaptation and repair, focusing on serial fMRI to monitor response to disease-modifying therapies or rehabilitation interventions. Finally, we offer recommendations for designing future research studies to overcome previous methodological shortcomings.
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Enzinger et al. (2015) conducted a review in Multiple sclerosis. Longitudinal fMRI vs. Cross-sectional fMRI was evaluated. Longitudinal fMRI offers the potential to track brain plasticity, adaptation, and repair in evolving multiple sclerosis and monitor responses to disease-modifying therapies or rehabilitation.
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