Many studies have discussed the difference in brain activity related to encoding and retrieval of working memory (WM) tasks. However, it remains unclear if there is a change in brain activation associated with re-encoding. The main objective of this study was to compare different brain states (rest, encoding, and re-encoding) during the WM task. We recorded brain activity from thirty-seven participants using an electroencephalogram and calculated power spectral density (PSD) and phase-locking value (PLV) for different frequencies. In addition, the difference in phase-amplitude coupling (PAC) between encoding and re-encoding was investigated. Our results showed that alpha PSD decreased as the learning progressed, and theta PLV, beta PLV, and gamma PLV showed differences between brain regions. Also, there was a statistically significant difference in PAC. These findings suggest the possibility of improving the efficiency of learning during re-encoding by understanding the differences in neural correlation related to learning.
@article{arxiv.2112.06464,
title = {Differential EEG Characteristics during Working Memory Encoding and Re-encoding},
author = {Gi-Hwan Shin and Young-Seok Kweon},
journal= {arXiv preprint arXiv:2112.06464},
year = {2021}
}
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Submitted to 2022 10th IEEE International Winter Conference on Brain-Computer Interface