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01.02.2016 | Neuro

Structural correlates for fatigue in early relapsing remitting multiple sclerosis

verfasst von: Janine Wilting, Hans O. Rolfsnes, Hilga Zimmermann, Marion Behrens, Vinzenz Fleischer, Frauke Zipp, Adriane Gröger

Erschienen in: European Radiology | Ausgabe 2/2016

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Abstract

Objectives

Fatigue is a common symptom in multiple sclerosis (MS) patients, even early in the disease, but the pathophysiology remains unclear. We aimed to determine morphologic and microstructural correlates and neuropsychological parameters of cognitive fatigue in early relapsing-remitting MS patients.

Methods

Seventy-nine early relapsing-remitting MS patients (38 with fatigue and 41 without), none of whom suffered from depression, underwent neuropsychological testing. Magnetic resonance imaging was performed using anatomical and diffusion tensor imaging sequences on all patients and 40 controls. Voxel-based morphologic analysis and tract-based spatial statistics were performed.

Results

Only patients with cognitive fatigue, but not those without, exhibited alterations in the thalamic region, showing reduced thalamic fractional anisotropy and increased mean diffusivity values. No differences in lesion volume and lesion distribution were observed between patient groups. In cognitive tests, no significant differences were found between the two groups in the number of patients with pathologic scores; however, subjective cognitive impairment differed.

Conclusion

Morphological alterations and distinct microstructural changes (mainly in the thalamus) but not typical MS lesions were found to be related to cognitive fatigue in early MS. We suggest that compensatory processes adapting to these changes could initially facilitate normal cognitive performance, but also result in a feeling of fatigue.

Key points

• Morphological alterations and microstructural changes are related to fatigue in multiple sclerosis

• Thalamic alterations in particular were related to fatigue in early MS

• Fatigued patients exhibited subjective but not measurable cognitive impairment

• Compensatory processes help preserve or maintain cognitive performance but also contribute to fatigue

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Titel: Structural correlates for fatigue in early relapsing remitting multiple sclerosis
verfasst von: Janine Wilting
Hans O. Rolfsnes
Hilga Zimmermann
Marion Behrens
Vinzenz Fleischer
Frauke Zipp
Adriane Gröger
Publikationsdatum: 01.02.2016
Verlag: Springer Berlin Heidelberg
Erschienen in: European Radiology / Ausgabe 2/2016
Print ISSN: 0938-7994
Elektronische ISSN: 1432-1084
DOI: https://doi.org/10.1007/s00330-015-3857-2

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Structural correlates for fatigue in early relapsing remitting multiple sclerosis