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Updated: Jun 18, 2025
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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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Neural correlates of perisaccadic visual mislocalization in extrastriate cortex
Geyu Weng1,2, Amir Akbarian2, Kelsey Clark2
1Department of Biomedical Engineering, University of Utah, Salt Lake City, UT, USA.
Nature Communications
|July 27, 2024
Summary
Perisaccadic mislocalization, a visual bias during eye movements, is explained by neural mechanisms in extrastriate areas. This study reveals how visual areas prioritize saccade target representation, impacting spatial perception.
Area of Science:
- Neuroscience
- Computational Neuroscience
- Visual Perception
Background:
- Saccadic eye movements (saccades) cause perisaccadic mislocalization, altering visual stimulus perception.
- The neural basis for this visuospatial alteration and its relation to other perisaccadic phenomena remain unclear.
Purpose of the Study:
- To investigate the neural mechanisms underlying perisaccadic spatial bias around the saccade target (ST).
- To link extrastriate neuronal activity to observed behavioral biases in spatial perception.
Main Methods:
- Electrophysiological recordings from extrastriate areas in macaque monkeys.
- Development of a computational model to quantify spatial bias based on neuronal spatiotemporal sensitivity.
- Correlation of model predictions with behavioral data.
Main Results:
- The computational model successfully predicted perisaccadic spatial bias around the ST, aligning with behavioral observations.
- Identified specific neuronal response components responsible for representational bias.
- Demonstrated that enhanced sensitivity in neurons with receptive fields distant from the ST drives the ST spatial bias.
Conclusions:
- Extrastriate areas play a crucial role in generating perisaccadic spatial bias by prioritizing saccade target representation.
- Visual areas allocate resources to enhance ST representation, potentially causing transient spatial distortions.
- These findings suggest a general role for extrastriate neurons in constructing perceived stimulus location.
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