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Related Experiment Video

Updated: Dec 23, 2025

Using Unidirectional Rotations to Improve Vestibular System Asymmetry in Patients with Vestibular Dysfunction
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Network changes in patients with phobic postural vertigo.

Judita Huber1,2, Virginia L Flanagin1,2,3, Pauline Popp1,3

  • 1Graduate School of Systemic Neurosciences, Department Biology II Neurobiology, Ludwig-Maximilians-Universität München, Planegg-Martinsried, Germany.

Brain and Behavior
|April 19, 2020
PubMed
Summary

Phobic postural vertigo (PPV) patients show altered brain network connectivity, particularly in sensory and cerebellar networks, impacting visual motion processing. This suggests functional brain mechanisms underlie PPV symptoms.

Keywords:
connectomedizzinessfunctional magnetic resonance imagingvertigovisual stimulation

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Area of Science:

  • Neuroscience
  • Vestibular Disorders
  • Functional Neuroimaging

Background:

  • Functional dizziness disorders, like phobic postural vertigo (PPV), present vestibular symptoms without a clear organic cause.
  • Functional brain mechanisms are increasingly implicated in the pathophysiology of these disorders.

Purpose of the Study:

  • To investigate functional network organization in patients with phobic postural vertigo (PPV) compared to healthy controls (HCs).
  • To examine alterations in brain network connectivity during visual motion stimulation in PPV.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) was used to assess brain activity in 17 PPV patients and 18 HCs.
  • Graph theoretical measures, including degree centrality (DC) and clustering coefficient (CC), were calculated for 160 nodes across six functional networks.
  • Network organization was compared between static visual patterns and dynamic visual motion stimuli.

Main Results:

  • Significant differences in degree centrality (DC) were observed in the default-mode, sensorimotor, and cerebellar networks during static visual conditions.
  • PPV patients exhibited a significantly stronger increase in DC and CC within the sensorimotor network during visual motion stimulation.
  • Conversely, the cerebellar network showed a significantly stronger decrease in DC in PPV patients during visual motion stimulation compared to HCs.

Conclusions:

  • Altered visual motion processing in PPV may stem from modified sensory and cerebellar network connectivity.
  • These findings highlight the role of functional brain network alterations in the manifestation of phobic postural vertigo.