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Related Experiment Video

Updated: Apr 17, 2026

Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity

Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity

Published on: March 18, 2019

Suppressive interactions underlying visually evoked fixational saccades.

Helena X Wang¹, Shlomit Yuval-Greenberg², David J Heeger¹

¹Center for Neural Science, New York University, New York, NY, United States; Dept. of Psychology, New York University, New York, NY, United States.

Vision Research

|February 4, 2015

Summary

This summary is machine-generated.

Small saccades, or tiny eye movements, are influenced by visual stimuli. Competitive neural interactions in visuomotor maps shape the rate and direction of these fixational saccades, revealing suppressive mechanisms.

Keywords:

Fixational eye movements Microsaccades Superior colliculus Suppression Visual attention Visuomotor maps

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Area of Science:

Neuroscience
Vision Science
Computational Neuroscience

Background:

Small saccades (fixational saccades) are frequent during visual fixation.
These eye movements are linked to visual stimulation and cognitive state.
Visuomotor maps are neural structures involved in eye movement control.

Purpose of the Study:

To investigate how neural interactions within visuomotor maps influence the rate and direction of small fixational saccades.
To understand the impact of parafoveal and peripheral visual stimuli on fixational saccade behavior.

Main Methods:

Measured fixational saccades during prolonged fixation.
Presented pairs of visual stimuli with varying contrasts at parafoveal (0.8°) and peripheral (5°) eccentricities.
Analyzed saccade rate and direction bias in response to stimuli.

Main Results:

Fixational saccade direction was biased towards parafoveal stimuli (not peripheral) 100-250ms after onset.
Saccade rate towards parafoveal stimuli increased with contrast.
Peripheral stimuli suppressed saccade rate and direction bias via subtractive and divisive mechanisms, respectively.

Conclusions:

Neural interactions within visuomotor maps shape fixational saccade characteristics.
Suppressive interactions involve both rate reduction and direction bias modulation.
Findings constrain computational models of population coding for fixational eye movements.