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Title: Alterations in functional connectivity are associated with white matter lesions and information processing efficiency in multiple sclerosis
Authors: Magalhães, R.
Soares, José Miguel
Conde, Raquel
Magalhães, Ricardo
Marques, Paulo
Magalhães, Rosana
Gomes, Luciana
Gonçalves, Óscar Filipe Coelho Neves 
Arantes, Mavilde
Sampaio, Adriana 
Keywords: Functional connectivity; Information processing efficiency; Multiple sclerosis; Resting State; White matter lesion
Issue Date: 2021
Volume: 15
Issue: 1
Abstract: Functional connectivity (FC) is typically altered in individuals with Multiple Sclerosis (MS). However, in relapsing-remitting multiple sclerosis (RRMS) patients, the relationship between brain FC, tissue integrity and cognitive impairment is still unclear as contradictory findings have been documented. In this exploratory study we compared both the whole brain connectome and resting state networks (RSNs) FC of twenty-one RRMS and seventeen healthy controls (HCs), using combined network based statistics and independent component analyses. The total white matter (WM) lesion volume and information processing efficiency were also correlated with FC in the RRMS group. Both whole brain connectome and individual RSNs FC were diminished in patients with RRMS compared to HC. Additionally, the reduction in FC was found to be a function of the total WM lesion volume, with greatest impact in those harboring the largest lesion volume. Finally, a positive correlation between FC and information processing efficiency was observed in RRMS. This complimentary whole brain and RSNs FC approach can contribute to clarify literature inconsistencies regarding FC alterations and provide new insights on the white matter structural damage in explaining functional abnormalities in RRMS.
ISSN: 1931-7557
DOI: 10.1007/s11682-020-00264-z
Rights: openAccess
Appears in Collections:FPCEUC - Artigos em Revistas Internacionais

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