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Related Concept Videos

The Vestibular System01:29

The Vestibular System

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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Equilibrium and Balance

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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Major Somatic Sensory Pathways01:28

Major Somatic Sensory Pathways

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Somatosensory, Motor, and Association Cortex01:23

Somatosensory, Motor, and Association Cortex

The somatosensory cortex in the parietal lobes is crucial for interpreting sensory data such as touch, temperature, and proprioception. The somatosensory cortex, situated in the parietal lobes, plays a vital role in interpreting sensory information like touch, temperature, and proprioception—awareness of body position. This specialized brain region features an organized structure wherein neurons at the top primarily process sensations originating from the lower body. In contrast, those at the...
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Related Experiment Video

Updated: Jul 2, 2026

Using Eye-tracking to Assess the Relative Importance of Visual and Vestibular Input to Subcortical Motion Processing in the Roll Plane
07:24

Using Eye-tracking to Assess the Relative Importance of Visual and Vestibular Input to Subcortical Motion Processing in the Roll Plane

Published on: August 22, 2025

Cortical processing in vestibular navigation.

Barry M Seemungal1, Vincenzo Rizzo, Michael A Gresty

  • 1Department of Clinical Neuroscience, Charing Cross Hospital, Imperial College, London, UK. b.seemungal@imperial.ac.uk

Progress in Brain Research
|August 23, 2008
PubMed
Summary
This summary is machine-generated.

Early visual deprivation does not impair vestibular perception. Instead, both visual and vestibular signals for displacement are processed in the same brain region, the posterior parietal cortex (PPC).

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Area of Science:

  • Neuroscience
  • Sensory Perception
  • Vestibular System

Background:

  • Visual and vestibular systems interact for head motion perception.
  • Existing theories propose separate cortical areas for visual and vestibular velocity processing.
  • The role of visual experience in vestibular displacement perception is unclear.

Purpose of the Study:

  • Investigate the impact of early visual deprivation on vestibular perception.
  • Determine if visual and vestibular signals for displacement are processed in common or distinct cortical areas.
  • Examine the neural basis of vestibular displacement encoding using repetitive transcranial magnetic stimulation (rTMS).

Main Methods:

  • Compared performance in a path-reversal vestibular navigation task between congenitally blind and sighted individuals.
  • Applied rTMS to the right posterior parietal cortex (PPC) in sighted subjects to disrupt encoding during the vestibular task.
  • Assessed both displacement and velocity matching strategies in participants.

Main Results:

  • Congenitally blind and sighted individuals showed equivalent performance on the vestibular navigation task.
  • rTMS applied to the right PPC disrupted vestibular-derived displacement encoding for leftward rotations in sighted subjects.
  • Velocity encoding was not affected by rTMS in the PPC.

Conclusions:

  • Early visual experience is not essential for accurate vestibular perception of head velocity or displacement.
  • Vestibular-derived displacement perception, particularly for leftward motion, is encoded in the right posterior parietal cortex (PPC).
  • Suggests a common cortical locus for visual and vestibular signals in displacement perception, challenging existing models of velocity perception.