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Cortical control of eye movements
1Division of Neurology, Toronto Hospital University of Toronto, Ontario, Canada.
Current Opinion in Neurology
|March 4, 1998
Summary
This review explores how brain activity, measured by event-related potentials and imaging, reveals the cerebral hemispheres' roles in eye movements like saccades. It also examines connections between smooth pursuit, motion perception, and blindsight, including effects of strabismus.
Area of Science:
- Neuroscience
- Ophthalmology
- Cognitive Science
Background:
- Cerebral hemispheres play crucial roles in generating voluntary and reflexive saccades.
- Understanding visual-motor integration is key to comprehending motion processing and perception.
Purpose of the Study:
- To review event-related cortical potentials and imaging data on hemispheric roles in saccade generation.
- To discuss the interplay between smooth pursuit, visual motion discrimination, and blindsight.
- To examine the impact of strabismus on cortical motion processing and smooth pursuit.
Main Methods:
- Review of event-related cortical potentials.
- Analysis of brain imaging studies.
- Synthesis of existing literature on smooth pursuit, motion discrimination, and strabismus.
Main Results:
- Event-related potentials and imaging elucidate hemispheric contributions to saccade control.
- Relationships between smooth pursuit, motion discrimination, and blindsight are highlighted.
- Strabismus significantly affects cortical processing of motion and smooth pursuit.
Conclusions:
- Hemispheric specialization is evident in saccade generation.
- Visual-motor pathways are intricately linked, influencing motion perception and awareness.
- Strabismus presents unique challenges to visual processing, impacting motion perception and eye movement control.