Autoren:	Fleischer, Vinzenz Muthuraman, Muthuraman Anwar, Abdul Rauf Gonzalez-Escamilla, Gabriel Radetz, Angela Gracien, René-Maxime Bittner, Stefan Lüssi, Felix Meuth, Sven G. Zipp, Frauke Groppa, Sergiu
Titel:	Continuous reorganization of cortical information flow in multiple sclerosis : a longitudinal fMRI effective connectivity study
Online-Publikationsdatum:	29-Jun-2020
Erscheinungsdatum:	2020
Sprache des Dokuments:	Englisch
Zusammenfassung/Abstract:	Effective connectivity (EC) is able to explore causal effects between brain areas and can depict mechanisms that underlie repair and adaptation in chronic brain diseases. Thus, the application of EC techniques in multiple sclerosis (MS) has the potential to determine directionality of neuronal interactions and may provide an imaging biomarker for disease progression. Here, serial longitudinal structural and resting-state fMRI was performed at 12-week intervals over one year in twelve MS patients. Twelve healthy subjects served as controls (HC). Two approaches for EC quantification were used: Causal Bayesian Network (CBN) and Time-resolved Partial Directed Coherence (TPDC). The EC strength was correlated with the Expanded Disability Status Scale (EDSS) and Fatigue Scale for Motor and Cognitive functions (FSMC). Our findings demonstrated a longitudinal increase in EC between specific brain regions, detected in both the CBN and TPDC analysis in MS patients. In particular, EC from the deep grey matter, frontal, prefrontal and temporal regions showed a continuous increase over the study period. No longitudinal changes in EC were attested in HC during the study. Furthermore, we observed an association between clinical performance and EC strength. In particular, the EC increase in fronto-cerebellar connections showed an inverse correlation with the EDSS and FSMC. Our data depict continuous functional reorganization between specific brain regions indicated by increasing EC over time in MS, which is not detectable in HC. In particular, fronto-cerebellar connections, which were closely related to clinical performance, may provide a marker of brain plasticity and functional reserve in MS.
DDC-Sachgruppe:	610 Medizin 610 Medical sciences
Veröffentlichende Institution:	Johannes Gutenberg-Universität Mainz
Organisationseinheit:	FB 04 Medizin
Veröffentlichungsort:	Mainz
ROR:	https://ror.org/023b0x485
DOI:	http://doi.org/10.25358/openscience-4948
Version:	Published version
Publikationstyp:	Zeitschriftenaufsatz
Nutzungsrechte:	CC BY
Informationen zu den Nutzungsrechten:	https://creativecommons.org/licenses/by/4.0/
Zeitschrift:	Scientific reports 10
Seitenzahl oder Artikelnummer:	Art. 806
Verlag:	Macmillan Publishers Limited, part of Springer Nature
Verlagsort:	London
Erscheinungsdatum:	2020
ISSN:	2045-2322
URL der Originalveröffentlichung:	http://dx.doi.org/10.1038/s41598-020-57895-x
DOI der Originalveröffentlichung:	10.1038/s41598-020-57895-x
Enthalten in den Sammlungen:	JGU-Publikationen