Feature learning framework based on EEG graph self-attention networks for motor imagery BCI systems.
J Neurosci Methods
; 399: 109969, 2023 11 01.
Article
in En
| MEDLINE
| ID: mdl-37683772
ABSTRACT
Learning distinguishable features from raw EEG signals is crucial for accurate classification of motor imagery (MI) tasks. To incorporate spatial relationships between EEG sources, we developed a feature set based on an EEG graph. In this graph, EEG channels represent the nodes, with power spectral density (PSD) features defining their properties, and the edges preserving the spatial information. We designed an EEG based graph self-attention network (EGSAN) to learn low-dimensional embedding vector for EEG graph, which can be used as distinguishable features for motor imagery task classification. We evaluated our EGSAN model on two publicly available MI EEG datasets, each containing different types of motor imagery tasks. Our experiments demonstrate that our proposed model effectively extracts distinguishable features from EEG graphs, achieving significantly higher classification accuracies than existing state-of-the-art methods.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Algorithms
/
Brain-Computer Interfaces
Language:
En
Journal:
J Neurosci Methods
Year:
2023
Document type:
Article
Affiliation country:
China