Exploration of the relationships between regional grey matter atrophy and cognition in multiple sclerosis

Brain Imaging and Behavior
Ugo NocentiniJohn De Luca

Abstract

Cognitive impairment may result in significant disability in patients with Multiple Sclerosis (MS). Previous Magnetic Resonance Imaging (MRI) studies on cognition in MS were mainly based on measures of gross brain involvement. This study, using voxel-based morphometry (VBM), aims to investigate associations between the regional distribution of grey matter (GM) damage and cognitive performance in patients with MS. Eighteen MS patients underwent an extensive neuropsychological battery and MRI, including T2-weighted scans and T1-weighted volumes. A group of 18 healthy individuals were also investigated by MRI and served as controls for the VBM. A cross-sectional analysis was first performed, to assess the pattern of regional GM atrophy in MS patients. Then, the impact of regional GM damage on patients' neuropsychological performance was investigated by multiple regression analyses in the patient group. Correlations between global indexes of brain damage and neuropsychological measures were also assessed for comparison with previous literature. The comparison between MS patients and healthy controls revealed a widespread pattern of regional GM atrophy. Consistent with previous studies, associations were found between neuropsycholog...Continue Reading

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