Rapid stimulus-driven modulation of slow ocular position drifts

The eyes are never still during maintained gaze fixation. When microsaccades are not occurring, ocular position exhibits continuous slow changes, often referred to as drifts. Unlike microsaccades, drifts remain to be viewed as largely random eye movements. Here we found that ocular position drifts c...

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Published in:eLife 2020-08, Vol.9
Main Authors: Malevich, Tatiana, Buonocore, Antimo, Hafed, Ziad M
Format: Article
Language:English
Subjects:
Animals
Binocular vision
Confidence intervals
Drift
Eye
Eye movements
Fixation, Ocular
fixational eye movements
Frequency dependence
Gaze
Head Movements
Latency
Macaca mulatta
microsaccades
Neuroscience
Observations
Photoreceptors
Reaction Time
Short Report
slow ocular position drifts
Vision, Ocular
Visual Perception
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Buonocore, Antimo
Hafed, Ziad M
description The eyes are never still during maintained gaze fixation. When microsaccades are not occurring, ocular position exhibits continuous slow changes, often referred to as drifts. Unlike microsaccades, drifts remain to be viewed as largely random eye movements. Here we found that ocular position drifts can, instead, be very systematically stimulus-driven, and with very short latencies. We used highly precise eye tracking in three well trained macaque monkeys and found that even fleeting (~8 ms duration) stimulus presentations can robustly trigger transient and stimulus-specific modulations of ocular position drifts, and with only approximately 60 ms latency. Such drift responses are binocular, and they are most effectively elicited with large stimuli of low spatial frequency. Intriguingly, the drift responses exhibit some image pattern selectivity, and they are not explained by convergence responses, pupil constrictions, head movements, or starting eye positions. Ocular position drifts have very rapid access to exogenous visual information.
doi_str_mv 10.7554/elife.57595
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source PubMed Central（OA）; ProQuest - Publicly Available Content Database
subjects Animals
Binocular vision
Confidence intervals
Drift
Eye
Eye movements
Fixation, Ocular
fixational eye movements
Frequency dependence
Gaze
Head Movements
Latency
Macaca mulatta
microsaccades
Neuroscience
Observations
Photoreceptors
Reaction Time
Short Report
slow ocular position drifts
Vision, Ocular
Visual Perception
title Rapid stimulus-driven modulation of slow ocular position drifts
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