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Updated: May 16, 2026

Eye Movement Monitoring of Memory

Eye Movement Monitoring of Memory

Published on: August 15, 2010

Blinks slow memory-guided saccades.

Alice S Powers¹, Michele A Basso, Craig Evinger

¹Department of Psychology, Stony Brook University, Stony Brook, NY 11794-2500, USA. alice.powers@stonybrook.edu

Journal of Neurophysiology

|November 17, 2012

Summary

This summary is machine-generated.

Gaze-evoked blinks significantly slow memory-guided saccades, more so than previously thought. This study reveals that blinks, not just lack of vision, are a major cause of slower eye movements during memory tasks.

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Area of Science:

Neuroscience
Ophthalmology
Motor Control

Background:

Memory-guided saccades are known to be slower than visually guided saccades.
The prevailing theory attributes this slowing to reduced neural drive in the superior colliculus due to the absence of visual input.

Purpose of the Study:

To investigate the role of gaze-evoked blinks in the slowing of memory-guided saccades.
To compare the frequency and impact of blinks during memory-guided versus visually guided saccades.

Main Methods:

Recorded gaze-evoked blinks in three monkeys during both visually guided and memory-guided saccade tasks.
Analyzed saccade kinematics, comparing performance with and without blinks.

Main Results:

Gaze-evoked blinks occurred more frequently during memory-guided saccades.
Blinking disrupted the relationship between peak and average saccade velocity.
The slowing of memory-guided saccades was significantly greater when blinks were present.

Conclusions:

Gaze-evoked blinks contribute substantially to the slowing of memory-guided saccades.
Interactions between saccade and blink circuits increase saccade trajectory curvature and decrease velocity.
Blink amplitude correlates with increased saccade curvature and slowing.