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Visual processing is diminished during movement execution
Joëlle Hajj1, Dana Maslovat2, Erin K Cressman1
1School of Human Kinetics, University of Ottawa, Ottawa, Canada.
Plos One
|March 22, 2019
Summary
Visual perception is not enhanced during movement preparation. However, visual processing is significantly impaired during fast, goal-directed movement execution, especially with visual feedback.
Area of Science:
- Cognitive Neuroscience
- Human Motor Control
- Visual Perception
Background:
- Previous research suggests visual processing may be enhanced during movement preparation and execution.
- The Inspection Time (IT) task is a common method for measuring visual perceptual processing speed.
Purpose of the Study:
- To investigate whether visual perceptual processing is augmented prior to or during a movement.
- To examine the impact of movement execution and visual feedback on visual discrimination abilities.
Main Methods:
- Participants completed an IT task involving identifying differences in a "pi" figure.
- Experiments included no-movement, movement preparation (foreperiod), and peak velocity movement conditions.
- Experiment 2 introduced a condition with visual feedback of limb motion during movement.
Main Results:
- No significant difference in IT performance was found between no-movement and foreperiod conditions.
- IT performance was significantly poorer during peak velocity movement compared to no-movement and foreperiod.
- Visual feedback during movement further degraded IT task performance.
Conclusions:
- Visual perceptual processing is not enhanced during the preparation phase of a movement.
- Executing fast, goal-directed movements significantly impairs visual perceptual processing.
- Visual feedback during movement execution exacerbates this visual processing deficit.
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