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Antisaccade performance predicted by neuronal activity in the supplementary eye field
M Schlag-Rey1, N Amador, H Sanchez
1Department of Neurobiology and Brain Research Institute, UCLA School of Medicine, Los Angeles, California 90095-1763, USA. msr@ucla.edu
Nature
|December 6, 1997
Summary
Voluntary gaze control involves suppressing unwanted eye movements. This study reveals that neurons in the supplementary eye field fire more during antisaccade tasks, enabling overrides of reflexive glances.
Area of Science:
- Neuroscience
- Oculomotor control
- Cognitive neuroscience
Background:
- Voluntary gaze control requires suppressing reflexive responses and generating goal-directed eye movements.
- The antisaccade task challenges these abilities by requiring gaze aversion from a stimulus.
Purpose of the Study:
- To understand the neuronal mechanisms underlying antisaccade performance.
- To investigate how visual neurons contribute to overriding reflexive saccades.
Main Methods:
- Recordings from the supplementary eye field (SEF) in monkeys during pro- and antisaccade tasks.
- Analysis of neuronal firing patterns in relation to eye movement trajectories.
Main Results:
- Visual and movement neurons in the SEF maintained spatial selectivity across both pro- and antisaccade trials.
- These neurons exhibited increased firing rates before antisaccades compared to prosaccades with identical trajectories.
Conclusions:
- Neuronal activity in the SEF plays a crucial role in voluntary gaze control.
- Increased firing rates suggest a top-down mechanism for overriding reflexive eye movements during antisaccade tasks.