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Updated: Jul 4, 2026
06:46
Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity
Published on: March 18, 2019
Parietal damage dissociates saccade planning from presaccadic perceptual facilitation
A Z Khan1, A Blangero, Y Rossetti
1Institut National de la Santé et de la Recherche Médicale U864, Espace et Action, Bron, Rhone-Alpes, France.
Cerebral Cortex (New York, N.Y. : 1991)
|June 7, 2008
Summary
The premotor theory of attention links eye movements to spatial attention. This study shows saccade planning and perceptual enhancement are separate, challenging the theory and implicating the parietal cortex.
Area of Science:
- Cognitive Neuroscience
- Ophthalmology
- Neuropsychology
Background:
- The premotor theory of attention posits shared mechanisms for saccadic eye movements and spatial attention shifts.
- Understanding the neural basis of attention and eye movement control is crucial for cognitive neuroscience.
Observation:
- A patient with parietal damage and unilateral optic ataxia was tested on a dual saccade/attentional task.
- The patient demonstrated intact saccade generation to the impaired visual field but failed to show presaccadic perceptual enhancement at the saccade goal.
Findings:
- A dissociation was observed between saccadic eye movements and presaccadic perceptual enhancement.
- Saccade planning to a location does not automatically entail enhanced processing at that location.
Implications:
- These findings challenge the premotor theory of attention by separating saccade planning from perceptual facilitation.
- The parietal cortex appears critical for integrating saccade planning with presaccadic perceptual enhancement.
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