Somatotopy of cervical dystonia in motor-cerebellar networks: Evidence from resting state fMRI.

Zito, Giuseppe A; Tarrano, Clément; Jegatheesan, Prasanthi; Ekmen, Asya; Béranger, Benoît; Rebsamen, Michael; Hubsch, Cécile; Sangla, Sophie; Bonnet, Cécilia; Delorme, Cécile; Méneret, Aurélie; Degos, Bertrand; Bouquet, Floriane; Brissard, Marion Apoil; Vidailhet, Marie; Gallea, Cécile; Roze, Emmanuel; Worbe, Yulia (2022). Somatotopy of cervical dystonia in motor-cerebellar networks: Evidence from resting state fMRI. Parkinsonism & related disorders, 94, pp. 30-36. Elsevier 10.1016/j.parkreldis.2021.11.034

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INTRODUCTION

Cervical dystonia is the most frequent form of isolated focal dystonia. It is often associated with a dysfunction in brain networks, mostly affecting the basal ganglia, the cerebellum, and the somatosensory cortex. However, it is unclear if such a dysfunction is somato-specific to the brain areas containing the representation of the affected body part, and may thereby account for the focal expression of cervical dystonia. In this study, we investigated resting state functional connectivity in the areas within the motor cortex and the cerebellum containing affected and non-affected body representations in cervical dystonia patients.

METHODS

Eighteen patients affected by cervical dystonia and 21 healthy controls had resting state fMRI. The functional connectivity between the motor cortex and the cerebellum, as well as their corresponding measures of gray matter volume and cortical thickness, were compared between groups. We performed seed-based analyses, selecting the different body representation areas in the precentral gyrus as seed regions, and all cerebellar areas as target regions.

RESULTS

Compared to controls, patients exhibited increased functional connectivity between the bilateral trunk representation area of the motor cortex and the cerebellar vermis 6 and 7b, respectively. These functional abnormalities did not correlate with structural changes or symptom severity.

CONCLUSIONS

Our findings indicate that the abnormal function of the motor network is somato-specific to the areas encompassing the neck representation. Functional abnormalities in discrete relevant areas of the motor network could thus contribute to the focal expression of CD.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Department of Radiology, Neuroradiology and Nuclear Medicine (DRNN) > Institute of Diagnostic and Interventional Neuroradiology
04 Faculty of Medicine > Department of Head Organs and Neurology (DKNS) > Clinic of Neurology

UniBE Contributor:

Rebsamen, Michael Andreas

Subjects:

600 Technology > 610 Medicine & health

ISSN:

1353-8020

Publisher:

Elsevier

Language:

English

Submitter:

Martin Zbinden

Date Deposited:

12 Apr 2022 17:18

Last Modified:

12 Apr 2022 17:27

Publisher DOI:

10.1016/j.parkreldis.2021.11.034

PubMed ID:

34875561

Uncontrolled Keywords:

Cerebellum Cervical dystonia Motor cortex Resting state fMRI

BORIS DOI:

10.48350/169201

URI:

https://boris.unibe.ch/id/eprint/169201

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