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Updated: Jul 18, 2025

Efficiently Recording the Eye-Hand Coordination to Incoordination Spectrum
Published on: March 21, 2019
Visuomotor coordination and cognitive capacity in blindsight.
Norihiro Takakuwa1, Tadashi Isa2
1Department of Neuroscience, Graduate School of Medicine, Kyoto University, Kyoto 606-8501, Japan; Max Planck Institute for Brain Research, 60438 Frankfurt am Main, Germany.
Blindsight allows individuals with primary visual cortex damage to react to visual stimuli without conscious sight. New research explores partial awareness and neural pathways, including the superior colliculus, for this phenomenon.
Area of Science:
- Neuroscience
- Cognitive Science
- Visual Perception
Background:
- Classical blindsight research indicates responses to visual stimuli despite primary visual cortex lesions.
- Recent studies investigate nuanced aspects like partial awareness ('type II blindsight') and complex task performance in blindsight models.
Purpose of the Study:
- To elucidate the neural pathways underlying blindsight.
- To explore the mechanisms behind flexible visuomotor association and cognitive control in blindsight.
Main Methods:
- Investigated parallel thalamic routes from the superior colliculus to extrastriate and frontoparietal cortices.
- Examined neural plasticity following lesions in the visual system.
Main Results:
- Identified parallel thalamic pathways mediating visual input via the superior colliculus.
- These pathways may support visuomotor association and cognitive control in blindsight subjects.
Conclusions:
- Blindsight involves complex neural circuitry beyond the primary visual cortex.
- Post-lesion neural plasticity likely plays a crucial role in the functional adaptation of these visual pathways.
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