Article (Scientific journals)
Altered functional brain connectivity in patients with visually induced dizziness
Van Ombergen, Angelique; Heine, Lizette; Jillings, Steven et al.
2017In NeuroImage, 14, p. 538-545
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Keywords :
rsfMRI; Visually induced dizziness; VID; Functional connectivity; Vertigo; Vestibular
Abstract :
[en] Background: Vestibular patients occasionally report aggravation or triggering of their symptoms by visual stimuli, which is called visually induced dizziness (VID). These patients therefore experience dizziness, discomfort, disorientation and postural unsteadiness. The underlying pathophysiology of VID is still poorly understood. Objective: The aimof the current explorative study was to gain a first insight in the underlying neural aspects of VID. Methods:We included 10 VID patients and 10 healthymatched controls, all ofwhich underwent a resting state fMRI scan session. Changes in functional connectivitywere explored bymeans of the intrinsic connectivity contrast (ICC). Seed-based analysis was subsequently performed in visual and vestibular seeds. Results: We found a decreased functional connectivity in the right central operculum (superior temporal gyrus), as well as increased functional connectivity in the occipital pole in VID patients as compared to controls in a hypothesis-free analysis. A weaker functional connectivity between the thalamus and most of the right putamen was measured in VID patients in comparison to controls in a seed-based analysis. Furthermore, also by means of a seed-based analysis, a decreased functional connectivity between the visual associative area and the left parahippocampal gyrus was found in VID patients. Additionally,we found increased functional connectivity between thalamus and occipital and cerebellar areas in the VID patients, as well as between the associative visual cortex and both middle frontal gyrus and precuneus. Conclusions:We found alterations in the visual and vestibular cortical network in VID patients that could underlie the typical VID symptoms such as a worsening of their vestibular symptoms when being exposed to challenging visual stimuli. These preliminary findings provide the first insights into the underlying functional brain connectivity in VID patients. Future studies should extend these findings by employing larger sample sizes, by investigating specific task-based paradigms in these patients and by exploring the implications for treatment.
Disciplines :
Neurology
Author, co-author :
Van Ombergen, Angelique
Heine, Lizette ;  Université de Liège > Centre de recherches du cyclotron
Jillings, Steven ;  University of Antwerp
Roberts, Edward R.
Jeurissen, Ben
Van Rompaey, Vincent
Mucci, Viviana
Vanhecke, Stefanie
Sijbers, Jan
Vanhevel, Floris
Sunaert, Stefan
Bahri, Mohamed Ali  ;  Université de Liège > Centre de Recherches du Cyclotron
Van de Heyning, Paul H.
Laureys, Steven  ;  Université de Liège > GIGA : Coma Group
Wuyts, Floris L.
More authors (5 more) Less
Language :
English
Title :
Altered functional brain connectivity in patients with visually induced dizziness
Publication date :
2017
Journal title :
NeuroImage
ISSN :
1053-8119
eISSN :
1095-9572
Publisher :
Elsevier Science, Orlando, United States - Florida
Volume :
14
Pages :
538-545
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 29 June 2017

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