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Boonyakitanont P, Gabrielson B, Belyaeva I, Olikkal P, Songsiri J, Wang YP, Wilson TW, Calhoun VD, Stephen JM, Adali T. An ICA-based framework for joint analysis of cognitive scores and MEG event-related fields. 2022 44th Annual International Conference of the IEEE Engineering in Medicine & Biology Society (EMBC) 2022; 2022:3594-3598. [PMID: 36086046 DOI: 10.1109/embc48229.2022.9871122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
This paper proposes an independent component analysis (ICA)-based framework for exploring associations between neural signals measured with magnetoencephalography (MEG) and non-neuroimaging data of healthy subjects. Our proposed framework contains methods for subject group identification, latent source estimation of MEG, and discriminatory source visualization. Hierarchical clustering on principal components (HCPC) is used to cluster subject groups based on cognitive scores, and ICA is performed on MEG evoked responses such that not only higher-order statistics but also sample dependence within sources is taken into account. The clustered subject labels and estimated sources are jointly analyzed to determine discriminatory sources. Finally, discriminatory sources are used to calculate global difference maps (GDMs) for the summary. Results using a new data set reveal that estimated sources are significantly correlated with cognitive measures and subject demographics. Discriminatory sources have significant correlations with variables that have not been previously used for group identification, and GDMs can effectively identify group differences.
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Affiliation(s)
| | - B. Gabrielson
- University of Maryland,Baltimore County, Baltimore,MD,USA
| | - I. Belyaeva
- University of Maryland,Baltimore County, Baltimore,MD,USA
| | - P. Olikkal
- University of Maryland,Baltimore County, Baltimore,MD,USA
| | | | | | - T. W. Wilson
- Boys Town National Research Hospital,Omaha,NE,USA
| | - V. D. Calhoun
- Lovelace Biomedical Research Institute,The Mind Research Network a division,Albuquerque,NM,USA
| | - J. M. Stephen
- Lovelace Biomedical Research Institute,The Mind Research Network a division,Albuquerque,NM,USA
| | - T. Adali
- University of Maryland,Baltimore County, Baltimore,MD,USA
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