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Related Concept Videos

The Vestibular System01:29

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The vestibular system is a set of inner ear structures that provide a sense of balance and spatial orientation. This system is comprised of structures within the labyrinth of the inner ear, including the cochlea and two otolith organs—the utricle and saccule. The labyrinth also contains three semicircular canals—superior, posterior, and horizontal—that are oriented on different planes.
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The inner ear assumes dual functionalities of auditory perception and equilibrium maintenance. The vestibule is the organ responsible for balance. This organ contains mechanoreceptors, specifically hair cells, endowed with stereocilia, which aid in deciphering information regarding the position and motion of our heads. Two intrinsic components, the utricle and saccule, help perceive head position, while the semicircular canals track head movement. Neurological messages initiated in the...
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Related Experiment Video

Updated: May 3, 2026

Measuring the Influence of Magnetic Vestibular Stimulation on Nystagmus, Self-Motion Perception, and Cognitive Performance in a 7T MRT
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Galvanic vestibular stimulation in hemi-spatial neglect.

David Wilkinson1, Olga Zubko1, Mohamed Sakel2

  • 1School of Psychology, University of Kent Canterbury, UK.

Frontiers in Integrative Neuroscience
|February 14, 2014
PubMed
Summary

Galvanic vestibular stimulation (GVS) significantly reduced hemi-spatial neglect in stroke patients. This improvement persisted for at least one month after treatment, suggesting a lasting effect of GVS for attentional disorders.

Keywords:
clinical trialhemi-inattentionneuro-stimulationrehabilitationstroke

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Area of Science:

  • Neuroscience
  • Rehabilitation Medicine
  • Clinical Psychology

Background:

  • Hemi-spatial neglect is a debilitating attentional disorder following brain injury.
  • Galvanic vestibular stimulation (GVS) has shown promise in reducing neglect during stimulation.
  • The long-term effects of GVS on neglect symptoms remain largely unexplored.

Purpose of the Study:

  • To investigate the lasting effects of repeated galvanic vestibular stimulation (GVS) on hemi-spatial neglect.
  • To determine if multiple GVS sessions offer more sustained relief than a single session.
  • To assess the impact of GVS on functional capacity and safety.

Main Methods:

  • A double-blind, randomized, dose-response trial was conducted with 52 stroke patients experiencing left-sided neglect.
  • Participants received 1, 5, or 10 sessions of sub-sensory GVS (25 min each, 1 mA).
  • Improvements were measured using the Behavioral Inattention Test and Barthel Index (BI), with follow-up at 1 month.

Main Results:

  • All GVS treatment groups showed statistically significant improvements in neglect symptoms from baseline to the end of stimulation (mean change 28%).
  • These improvements were sustained one month post-stimulation.
  • A 20% increase in median Barthel Index scores was observed, with no adverse events reported.

Conclusions:

  • Galvanic vestibular stimulation (GVS) can produce clinically significant and lasting reductions in hemi-spatial neglect.
  • Repeated GVS sessions may enhance long-term benefits for attentional disorders.
  • GVS is a safe, cost-effective, and potentially home-administrable therapy requiring further study for effectiveness.