Functional connectivity changes within specific networks parallel the clinical evolution of multiple sclerosis

Basile, B, Castelli, M, Monteleone, F, Nocentini, U, Caltagirone, C, Centonze, D, Cercignani, M and Bozzali, M (2014) Functional connectivity changes within specific networks parallel the clinical evolution of multiple sclerosis. Multiple Sclerosis, 20 (8). pp. 1050-1057. ISSN 1352-4585

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Abstract

BACKGROUND

In multiple sclerosis (MS), the location of focal lesions does not always correlate with clinical symptoms, suggesting disconnection as a major pathophysiological mechanism. Resting-state (RS) functional magnetic resonance imaging (fMRI) is believed to reflect brain functional connectivity (FC) within specific neuronal networks.

OBJECTIVE

RS-fMRI was used to investigate changes in FC within two critical networks for the understanding of MS disabilities, namely, the sensory-motor network (SMN) and the default-mode network (DMN), respectively, implicated in sensory-motor and cognitive functions.

METHODS

Thirty-four relapsing-remitting (RR), 14 secondary progressive (SP) MS patients and 25 healthy controls underwent MRI at 3T, including conventional images, T1-weighted volumes, and RS-fMRI sequences. Independent component analysis (ICA) was employed to extract maps of the relevant RS networks for every participant. Group analyses were performed to assess changes in FC within the SMN and DMN in the two MS phenotypes.

RESULTS

Increased FC was found in both networks of MS patients. Interestingly, specific changes in either direction were observed also between RR and SP MS groups.

CONCLUSIONS

FC changes seem to parallel patients' clinical state and capability of compensating for the severity of clinical/cognitive disabilities.

Item Type: Article
Keywords: Relapsing–remitting multiple sclerosis secondary progressive multiple sclerosis resting-state functional magnetic resonance imaging functional connectivity
Schools and Departments: Brighton and Sussex Medical School > Neuroscience
Subjects: R Medicine > RC Internal medicine > RC0321 Neurosciences. Biological psychiatry. Neuropsychiatry > RC0346 Neurology. Diseases of the nervous system Including speech disorders
Depositing User: Patricia Butler
Date Deposited: 27 Nov 2015 11:18
Last Modified: 24 Jul 2017 17:33
URI: http://sro.sussex.ac.uk/id/eprint/54574
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