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Structural brain changes in medically refractory focal epilepsy resemble premature brain aging
Heath R Pardoe1, James H Cole2, Karen Blackmon1
1Comprehensive Epilepsy Center, Department of Neurology, New York University School of Medicine, 223 East 34th St, New York City, NY 10016, USA.
Epilepsy Research
|April 15, 2017
Summary
Medically refractory epilepsy shows accelerated brain aging, with brain age 4.5 years older than chronological age. Newly diagnosed epilepsy did not show this effect, suggesting a link between refractory epilepsy and premature brain aging.
Area of Science:
- Neuroimaging
- Epilepsy Research
- Computational Neuroscience
Background:
- Focal epilepsy is a common neurological disorder.
- Medically refractory epilepsy poses significant treatment challenges.
- Brain aging patterns may be altered in neurological conditions.
Purpose of the Study:
- To investigate whether medically refractory focal epilepsy is associated with accelerated brain aging.
- To compare brain age differences between patients with medically refractory focal epilepsy, newly diagnosed focal epilepsy, and healthy controls.
Main Methods:
- Utilized whole-brain T1-weighted MRI scans.
- Employed a machine learning model trained on a large healthy control dataset (N=2001) to estimate neuroanatomical age.
- Compared the difference between estimated brain age and chronological age across three groups: medically refractory epilepsy (N=94), newly diagnosed epilepsy (N=42), and healthy controls (N=74).
Main Results:
- Individuals with medically refractory epilepsy exhibited a significantly higher brain age difference, averaging 4.5 years older than healthy controls (p=4.6×10-5).
- No significant brain age difference was found in the newly diagnosed focal epilepsy group.
- An earlier age of onset correlated with a greater brain age difference in the medically refractory group (p=0.034).
Conclusions:
- Medically refractory focal epilepsy is characterized by structural brain changes indicative of premature aging.
- Brain aging metrics derived from MRI may serve as a potential biomarker for epilepsy refractoriness.