Graph Neural Networks in EEG-based Emotion Recognition: A Survey
It provides a structured review for researchers in brain-computer interfaces, focusing on EEG-based emotion recognition, but is incremental as it synthesizes existing work rather than introducing new methods.
This survey addresses the lack of comprehensive guidance for constructing Graph Neural Networks (GNNs) in EEG-based emotion recognition by categorizing existing methods under a unified framework of graph construction, analyzing them across three stages to provide clear guidance.
Compared to other modalities, EEG-based emotion recognition can intuitively respond to the emotional patterns in the human brain and, therefore, has become one of the most concerning tasks in the brain-computer interfaces field. Since dependencies within brain regions are closely related to emotion, a significant trend is to develop Graph Neural Networks (GNNs) for EEG-based emotion recognition. However, brain region dependencies in emotional EEG have physiological bases that distinguish GNNs in this field from those in other time series fields. Besides, there is neither a comprehensive review nor guidance for constructing GNNs in EEG-based emotion recognition. In the survey, our categorization reveals the commonalities and differences of existing approaches under a unified framework of graph construction. We analyze and categorize methods from three stages in the framework to provide clear guidance on constructing GNNs in EEG-based emotion recognition. In addition, we discuss several open challenges and future directions, such as Temporal full-connected graph and Graph condensation.