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Regional lobar atrophy predicts memory impairment in multiple sclerosis
Ralph H B Benedict1, Robert Zivadinov, Dominic A Carone
1Department of Neurology, SUNY Buffalo School of Medicine, Buffalo, NY 14203, USA.
AJNR. American Journal of Neuroradiology
|August 11, 2005
Summary
Regional brain atrophy significantly impacts memory and processing speed in multiple sclerosis (MS) patients. Specific lobar atrophy predicts memory deficits better than general atrophy or lesion load.
Area of Science:
- Neuroimaging
- Neurology
- Cognitive Science
Background:
- Whole brain atrophy correlates strongly with cognitive deficits in multiple sclerosis (MS).
- The impact of regional lobar atrophy on cognitive impairment in MS remains underexplored.
Purpose of the Study:
- To investigate the clinical significance of regional lobar atrophy in multiple sclerosis.
- To determine if regional atrophy predicts cognitive dysfunction better than other MRI measures.
Main Methods:
- Cross-sectional study of 31 multiple sclerosis patients.
- Brain MRI for lesion burden, general atrophy, central atrophy, and regional lobar atrophy (frontal, temporal, parietal, occipital).
- Neuropsychological testing focused on processing speed and memory, compared to healthy controls.
Main Results:
- Multiple sclerosis patients exhibited significant atrophy and cognitive impairment.
- Regional atrophy, particularly temporal lobe atrophy, was the strongest predictor of memory performance.
- Frontal lobe atrophy predicted learning consistency, while central and general atrophy predicted processing speed.
Conclusions:
- Regional lobar atrophy is a more significant predictor of memory dysfunction in multiple sclerosis than lesion burden, whole brain atrophy, or lateral ventricle volume.
- Understanding regional atrophy patterns can refine predictions of cognitive decline in MS.