[Submitted on 4 Oct 2026]
Title:SPERA: Spherical Prior EEG Foundation Model with Geometry- and Frequency-Aware Latent Prediction
View a PDF of the paper titled SPERA: Spherical Prior EEG Foundation Model with Geometry- and Frequency-Aware Latent Prediction, by Minsu Kim and 5 other authors
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Abstract:Electroencephalography (EEG) provides a non-invasive measure of ongoing neural activity, but building general-purpose EEG models remains challenging due to the heterogeneity of subjects, devices, and electrode montages. Existing EEG foundation models predominantly rely on reconstruction-based objectives defined on the observed signal, which contains both neural and non-neural components. We introduce SPERA (Spherical Prior EEG Representation Architecture), an EEG foundation model that adopts the joint-embedding predictive architecture (JEPA) to predict in latent space. SPERA introduces a Legendre-polynomial spatial prior, incorporated into attention to encode varying scalp electrode geometries. Two further components adapt the model to EEG: factorized temporal and spatial attention interleaved with periodic full-attention blocks, and a relational spectral regularizer aligning latent similarity structure with spectral views. Pretrained on approximately 80,000 hours of EEG from 29,048 subjects across 106 datasets, SPERA achieves the highest average balanced accuracy across nine downstream tasks spanning clinical, cognitive, and BCI applications. SPERA further exhibits strong parameter efficiency under linear probing and robustness across varying recording conditions, suggesting its potential as a general-purpose backbone for diverse EEG analyses.
Comments: Accepted at NeurIPS 2026
Subjects:
Machine Learning (cs.LG)
Cite as: arXiv:2610.10571 [cs.LG]
(or arXiv:2610.10571v1 [cs.LG] for this version)
https://doi.org/10.48550/arXiv.2610.10571
arXiv-issued DOI via DataCite
Submission history
From: Minsu Kim [view email] [v1] Sun, 4 Oct 2026 10:39:16 UTC (13,566 KB)
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