Universität zu Köln

Schneider, Lukas, Seeger, Valentin, Timmermann, Lars and Florin, Esther ORCID: 0000-0001-8276-2508 (2020). Electrophysiological resting state networks of predominantly akinetic-rigid Parkinson patients: Effects of dopamine therapy. NeuroImage-Clin., 25. OXFORD: ELSEVIER SCI LTD. ISSN 2213-1582

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Abstract

Parkinson's disease (PD) causes both motor and non-motor symptoms, which can partially be reversed by dopamine therapy. These symptoms as well as the effect of dopamine may be explained by distinct alterations in whole-brain architecture. We used functional connectivity (FC) and in particular resting state network (RSN) analysis to identify such whole-brain alterations in a frequency-specific manner. In addition, we hypothesized that standard dopaminergic medication would have a normalizing effect on these whole brain alterations. We recorded resting-state EEGs of 19 PD patients in the medical OFF and ON states, and of 12 healthy age-matched controls. The PD patients were either of akinetic-rigid or mixed subtype. We extracted RSNs with independent component analysis in the source space for five frequency bands. Within the sensorimotor network (SMN) the supplementary motor area (SMA) showed decreased FC in the OFF state compared to healthy controls. This finding was reversed after dopamine administration. Furthermore, in the OFF state no stable SMN beta component could be identified. The default mode network showed alterations due to PD independent of the medication state. The visual network was altered in the OFF state, and reinstated to a pattern similar to healthy controls by medication. In conclusion, PD causes distinct RSN alterations, which are partly reversed after levodopa administration. The changes within the SMN are of particular interest, because they broaden the pathophysiological understanding of PD. Our results identify the SMA as a central network hub affected in PD and a crucial effector of dopamine therapy.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Schneider, Lukas UNSPECIFIED UNSPECIFIED UNSPECIFIED Seeger, Valentin UNSPECIFIED UNSPECIFIED UNSPECIFIED Timmermann, Lars UNSPECIFIED UNSPECIFIED UNSPECIFIED Florin, Esther UNSPECIFIED orcid.org/0000-0001-8276-2508 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-351278
DOI:	10.1016/j.nicl.2019.102147
Journal or Publication Title:	NeuroImage-Clin.
Volume:	25
Date:	2020
Publisher:	ELSEVIER SCI LTD
Place of Publication:	OXFORD
ISSN:	2213-1582
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language DRUG-NAIVE PATIENTS; FUNCTIONAL CONNECTIVITY; SENSORIMOTOR NETWORK; SUBTHALAMIC NUCLEUS; BETA OSCILLATIONS; BRAIN NETWORKS; DISEASE; MODULATION; MOVEMENT; LEVODOPA Multiple languages Neuroimaging Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/35127