Blink-related dynamic switching between internal and external orienting networks while viewing videos
1Graduate School of Frontiers and Biosciences, Osaka University, Suita, Osaka, Japan; Graduate School of Medicine, Osaka University, Suita, Osaka, Japan; Center for Information and Neural Networks (CiNet), Suita, Osaka, Japan.
Spontaneous eyeblinks help us disengage attention from visual stimuli. This study found that blinking involves brain activity changes in regions like the hippocampus and cerebellum, supporting its role in attention shifting.
Area of Science:
- Neuroscience
- Cognitive Psychology
Background:
- Spontaneous eyeblinks occur frequently, exceeding lubrication needs.
- Previous research linked eyeblinks to attention network deactivation during video viewing.
Purpose of the Study:
- To investigate blink-related brain activity in temporal and subcortical regions.
- To determine if spontaneous eyeblinks actively disengage attention from external stimuli.
Main Methods:
- Utilized fMRI to examine brain activity during spontaneous eyeblinks while viewing videos.
- Analyzed temporal and subcortical brain regions, including the hippocampus and cerebellum.
Main Results:
- Blinks were associated with transient activation in the bilateral hippocampus and cerebellum.
- Blinks correlated with deactivation in the right ventral and dorsal attention networks.
- Observed dynamic brain activity shifts between external and internal attention networks.
Conclusions:
- Spontaneous eyeblinks play a role in attentional disengagement from visual information.
- Blinking facilitates a massive, dynamic shift in brain activity between external and internal focus.
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