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Related Experiment Videos

Interaction between cortical control of vestibular function and spatial representation in man.

J Ventre-Dominey1, N Nighoghossian, P Denise

  • 1Cognitive Sciences Institute, CNRS, Bron, France. ventre@isc.cnrs.fr

Annals of the New York Academy of Sciences
|April 14, 2005
PubMed
Summary

Unilateral posterior cortical lesions cause vestibulo-ocular reflex asymmetry in humans. This suggests the right hemisphere

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Area of Science:

  • Neuroscience
  • Vestibular System
  • Visuospatial Cognition

Background:

  • The vestibulo-ocular reflex (VOR) stabilizes gaze during head movements.
  • Unilateral cortical lesions can disrupt VOR function.
  • Visuospatial disorders are sometimes associated with vestibular deficits.

Purpose of the Study:

  • To investigate the functional link between vestibular information processing and visuospatial representation.
  • To determine the role of the posterior cortex, particularly the right hemisphere, in VOR asymmetry and spatial cognition.

Main Methods:

  • Observational study of human patients with unilateral posterior cortical lesions.
  • Assessment of vestibulo-ocular reflex (VOR) function.
  • Evaluation of visuospatial abilities.

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Main Results:

  • Asymmetry in the vestibulo-ocular reflex was observed following unilateral posterior cortical lesions.
  • A co-occurrence of vestibular deficits and visuospatial disorders was noted.
  • Findings suggest a functional connection within the right occipito-parieto-temporal cortex.

Conclusions:

  • The right occipito-parieto-temporal cortex integrates vestibular information crucial for spatial representation and update.
  • Lesions in this area disrupt both vestibular processing and visuospatial functions.
  • This highlights the hemisphere's role in coordinating sensory information for spatial awareness.