Related Experiment Video
Updated: May 21, 2025
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
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Superior colliculus peri-saccadic field potentials are dominated by a visual sensory preference for the upper visual
Ziad M Hafed1,2
1Werner Reichardt Centre for Integrative Neuroscience, University of Tübingen, Tübingen, Germany.
Iscience
|March 19, 2025
Summary
The superior colliculus (SC) network shows stronger sensory signals in the upper visual field, even during eye movements. This suggests visual field location influences SC activity during saccade generation.
Area of Science:
- Neuroscience
- Primate sensory-motor systems
Background:
- The primate superior colliculus (SC) integrates sensory and motor functions.
- The SC exhibits visual field asymmetries, with stronger visual responses in the upper visual field and weaker motor bursts for saccades.
Purpose of the Study:
- To investigate if peri-saccadic SC network activity reflects visual sensitivity asymmetries.
- To determine if sensory signals are embedded within the SC's motor bursts.
Main Methods:
- Analysis of collicular peri-saccadic local field potential (LFP) modulations in primates.
- Examining LFP modulations during saccades toward visual stimuli and blank screens.
- Assessing the impact of working memory engagement on SC LFP activity.
Main Results:
- Peri-saccadic LFP modulations were significantly stronger in the upper visual field representation, despite weaker motor bursts.
- This upper visual field dominance persisted even during saccades toward a blank screen.
- Working memory engagement differentially modulated SC LFP activity, showing upper/lower visual field asymmetries.
Conclusions:
- The SC network maintains a distinct sensory signal during saccade generation.
- Visual field location plays a crucial role in modulating SC activity during sensorimotor processing.
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