The objective of this study was to elucidate the no-motor component of fatigue mechanism in multiple sclerosis (MS) patients by studying the resting state functional connectivity (RS-FC) of default mode network (DMN). 12 with fatigue (F) and 10 without fatigue (nF) MS underwent resting sate magnetic resonance imaging (MRI). We selected 11 priori regions within the DMN as the regions of interests (ROIs) and ROI to ROI and ROI to global FC were calculated. Compared to nF-MS patients, F-MS patients showed abnormal increased functional connectivity in brain regions associated with cognitive function within the DMN.
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