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Reduced latency in manual interception with anticipatory smooth eye movements
Takeshi Miyamoto1, Kosuke Numasawa2, Riku Hirano3
1Graduate School of Informatics, Nagoya University, Aichi, Japan.
Iscience
|February 19, 2025
Summary
Anticipatory smooth eye movements (ASEMs) help us track moving objects by predicting their path. This study shows ASEMs speed up interception, improving visually guided actions beyond just compensating for processing delays.
Area of Science:
- Neuroscience
- Motor Control
- Visual Perception
Background:
- Visuomotor processing delays can lead to blurred perception of moving objects.
- Anticipatory smooth eye movements (ASEMs) are initiated before object motion to maintain central vision.
Purpose of the Study:
- To investigate the functional benefits of ASEMs in rapid visually guided behaviors.
- To determine if ASEMs expedite interception movements independently of predictive control.
Main Methods:
- Experimentally facilitated ASEMs in participants.
- Measured ASEM velocity and interception latency.
- Compared predictive and reactive control strategies.
Main Results:
- ASEMs were found to expedite the initiation of interception movements.
- A quantitative relationship between ASEM velocity and interception latency was observed.
- This relationship was stronger in participants using predictive control.
Conclusions:
- ASEMs play a crucial role in enhancing feedforward control for interception.
- ASEMs contribute to faster visually guided behaviors by providing extraretinal signals.
