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Updated: May 9, 2026
05:02
Using Unidirectional Rotations to Improve Vestibular System Asymmetry in Patients with Vestibular Dysfunction
Published on: August 30, 2019
Insular strokes cause no vestibular deficits.
Bernhard Baier1, Julian Conrad, Peter Zu Eulenburg
1Department of Neurology and Focus Program Translational Neurosciences, University Medical Centre of the Johannes Gutenberg University, Mainz, Germany. baierb@uni-mainz.de
Stroke
|July 23, 2013
Summary
Lesions exclusively in the posterior insular cortex (IC) do not cause vestibular otolith dysfunction. Adjacent vestibular network regions must also be affected to provoke symptoms like vertigo.
Area of Science:
- Neuroscience
- Vestibular System Research
- Neuroimaging and Clinical Neurology
Background:
- The posterior insular cortex (IC) is recognized as a key area for vestibular otolith perception.
- It is considered a core component of the human vestibular cortical network.
- The sufficiency of isolated posterior IC lesions to cause vestibular dysfunction remains unconfirmed.
Purpose of the Study:
- To investigate whether lesions restricted solely to the posterior insular cortex can induce vestibular otolith dysfunction.
- To determine if isolated posterior IC damage leads to symptoms of vestibular impairment.
Main Methods:
- Studied 10 acute unilateral stroke patients with lesions confined to the posterior insular cortex.
- Assessed patients for signs of vestibular otolith dysfunction, including subjective visual vertical (SVV) perception.
- These patients were selected from a larger cohort of 475 stroke patients.
Main Results:
- No patients experienced vertigo exclusively due to isolated IC lesions.
- No deficits in the perception of verticality (SVV tilts) were observed.
- No other vestibular otolith deficits, such as ocular torsion or skew deviation, were detected.
Conclusions:
- Isolated lesions of the posterior insular cortex do not appear to cause vestibular otolith deficits.
- Vestibular otolith dysfunction likely requires combined lesions affecting the posterior IC and adjacent vestibular network regions.
- This suggests a distributed nature of the human vestibular cortical network.
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