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Gaze and eye movement disorders.

S Ron1, S Gur

  • 1Occupational Health and Rehabilitation Institute, Loewenstein Hospital, Raanana, Israel.

Current Opinion in Neurology and Neurosurgery
|October 1, 1992
PubMed
Summary
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This study explores cortical areas involved in saccade control and gaze stabilization. It discusses the roles of the lateral intraparietal area, supplementary motor area, and posterior parietal cortex in eye movement regulation.

Area of Science:

  • Neuroscience
  • Ophthalmology
  • Vestibular System

Background:

  • Cortical areas like LIP, SMA, and PPC are implicated in saccade control.
  • The superior colliculus and cerebellum are suggested sites for spatial-to-temporal transformation.
  • The vestibulo-ocular reflex (VOR) and supplementary mechanisms correct inadequate eye movements.

Purpose of the Study:

  • To explore cortical areas involved in saccade control.
  • To understand the mechanisms of gaze stabilization.
  • To classify central vestibular disorders.

Main Methods:

  • Review of existing literature on saccade control and sensorimotor processing.
  • Analysis of lesion studies.
  • Examination of the vestibulo-ocular reflex and its supplementary mechanisms.

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Main Results:

  • The lateral intraparietal (LIP) area is crucial for spatial sensorimotor processing.
  • The supplementary motor area (SMA) is involved in goal-directed gaze control.
  • The posterior parietal cortex (PPC) plays a role in triggering visually guided saccades.

Conclusions:

  • Different cortical areas contribute to specific aspects of saccade control and gaze stabilization.
  • The superior colliculus (SC) and cerebellum are key in spatial-to-temporal transformations for eye movements.
  • A classification for central vestibular disorders affecting the brainstem and VOR has been proposed.