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Spontaneous Eye Blink Rate During the Working Memory Delay Period Predicts Task Accuracy
Jefferson Ortega1, Chelsea Reichert Plaska1,2, Bernard A Gomes3
1Department of Psychology, The City College of the City University of New York, New York, NY, United States.
Frontiers in Psychology
|March 4, 2022
Summary
Spontaneous eye blink rate (sEBR) predicts working memory (WM) accuracy. Higher blink rates during the WM delay period indicate better performance, suggesting sEBR reflects WM maintenance.
Area of Science:
- Cognitive Neuroscience
- Neuroscience
- Psychology
Background:
- Spontaneous eye blink rate (sEBR) is associated with attention and working memory (WM).
- sEBR changes are observed in neurological conditions like Parkinson's disease and schizophrenia, linked to dopamine activity.
- Previous studies often measured sEBR at baseline, not during WM task performance.
Purpose of the Study:
- To investigate how sEBR fluctuations during specific phases of a visual WM task predict task accuracy.
- To explore task-related modulation of sEBR in relation to attention and memory processes.
Main Methods:
- Two experiments recorded sEBR inside and outside an MRI scanner during a visual WM task.
- Analyzed correlations between sEBR and WM task accuracy across different task phases (encoding, delay, retrieval).
Main Results:
- sEBR positively correlated with WM task accuracy specifically during the WM delay period.
- sEBR was modulated by task demands: higher during the delay period (maintenance) and lower during stimulus encoding (attention).
Conclusions:
- sEBR during the delay period is a significant predictor of WM performance.
- Task-related changes in sEBR suggest its role in WM maintenance and attentional processes.
- Findings support sEBR as a potential biomarker for cognitive function and its link to dopamine activity.
