Key result
Canonical correlation analysis revealed that fNIRS activation in the frontal pole and dorsolateral prefrontal cortex during working memory tasks is significantly correlated with EEG delta, theta, and alpha rhythms.
Why the study?
To explore the neurovascular coupling mechanism of working memory by combining electroencephalography and functional near-infrared spectroscopy.
Cross-Sectional (n=23)
No
p-value: p=<0.01
The study demonstrates a new method for fusing EEG and fNIRS data to analyze the neurovascular coupling mechanism of working memory.
EEG-fNIRS coupling features may illuminate working memory mechanisms; leaves open validation and clinical translation.
Working memory is an important foundation for advanced cognitive function. The paper combines the spatiotemporal advantages of electroencephalography (EEG) and functional near-infrared spectroscopy (fNIRS) to explore the neurovascular coupling mechanism of working memory. In the data analysis, the convolution matrix of time series of different trials in EEG data and hemodynamic response function (HRF) and the blood oxygen change matrix of fNIRS are extracted as the coupling characteristics. Then, canonical correlation analysis (CCA) is used to calculate the cross correlation between the two modal features. The results show that CCA algorithm can extract the similar change trend of related components between trials, and fNIRS activation of frontal pole region and dorsolateral prefrontal lobe are correlated with the delta, theta, and alpha rhythms of EEG data. This study reveals the mechanism of neurovascular coupling of working memory, and provides a new method for fusion of EEG data and fNIRS data.
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Liu et al. (2022) conducted a cross-sectional in Healthy adults (working memory) (n=23). n-back working memory task was evaluated on Correlation between EEG time components and fNIRS spatial components using Canonical Correlation Analysis (CCA) (p=<0.01). Canonical correlation analysis revealed that fNIRS activation in the frontal pole and dorsolateral prefrontal cortex during working memory tasks is significantly correlated with EEG delta, theta, and alpha rhythms.
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