Spontaneous Blink Rate and Cognitive Function

Article: Blink! The Link between Aerobic Fitness and Cognition
Source: University of Tsukuba (Japan), via Technology Networks
Published: February 1, 2021

This study from the University of Tsukuba in Japan takes a neuroscience approach to the association between aerobic fitness and cognitive function through spontaneous eye blink rate (sEBR). Using blink rate as a "missing link" is possible because both sEBRs and physical activity are controlled by the dopaminergic system. Previous researchers had proposed that exercise-induced changes in cognitive function might be mediated by activity in the dopaminergic system. The present study sought to test that hypothesis through a measurable activity, in this case blink rate. The sample size of 35 participants is very small, though the researchers note that "As expected, we found significant correlations between aerobic fitness, cognitive function, and sEBR." The summary of the study is that aerobic activity and cognitive function are correlated, and both are correlated with spontaneous eye blink rate, which serves as a convenient noninvasive measure of dopaminergic activity common to both blinking and aerobic activity. The researchers hope to provide new directions to improve cognitive function through exercise. Peripherally relevant to eye care is the fact that yet another measure of cognitive function can be assessed through the eyes.

My rating of this study: ⭐

Kuwamizu R; Suwabe K, Damrongthai C, et al. "Spontaneous Eye Blink Rate Connects Missing Link between Aerobic Fitness and Cognition." Medicine & Science in Sports & Exercise.  53(7):1425-1433. Published online 1 February 2021. https://doi.org/10.1249/MSS.0000000000002590