arXiv AI

Sensor Geometry as a Flow-Matching Prior for Multi-Channel Brain Signals

arXiv Machine Learning
Oct 8

DenoFlow: Flow Matching for SSVEP Denoising under Real Physiological Artifacts

DenoFlow introduces a flow‑matching approach to denoise steady‑state visual evoked potential (SSVEP) EEG signals, avoiding direct mapping from noisy to clean data. It uses a field network that predicts the velocity of a straight path between contaminated and clean trials, integrating this field to produce denoised outputs while simultaneously training a classifier to supervise the result. Experiments on two public SSVEP datasets demonstrate that DenoFlow surpasses seven baseline denoising models in both signal fidelity and downstream decoding accuracy.

By Zhentao He, Ziwei Wang, Dongrui Wu
arXiv Machine Learning
Oct 22

BrainPro: Process-conditioned Pretraining with Topographic Retrieval for Large EEG Models

BrainPro is a process‑conditioned self‑supervised pretraining framework for large EEG models that addresses two underexplored challenges: the underuse of mental‑process cues in masked pretraining and the variability of electrode montages across datasets. It maps dataset‑specific montages to a universal channel‑region template, retrieves spatial filters to create a topographically aligned basis, and learns a shared encoder along with process‑specific branches conditioned on protocol cues. Experiments on nine public BCI benchmarks show that BrainPro outperforms baselines, with ablations indicating that topographic retrieval and process‑conditioned representation learning jointly enhance EEG decoding.

By Yi Ding, Muyun Jiang, Weibang Jiang, Shuailei Zhang, Xinliang Zhou, Chenyu Liu, Shanglin Li, Yong Li, Cuntai Guan
arXiv Machine Learning
Aug 20

Graph-Based Approaches to Learning Epileptogenic Zone Localization Using Stereo-EEG Recordings

The study evaluates how different graph topologies influence the localization of the epileptogenic zone (EZ) from resting‑state stereo‑EEG recordings in 40 patients. Using a consistent learning model and leave‑one‑patient‑out validation, the authors compare dense graphs, anatomy‑ and geometry‑informed priors, budgeted sparsification, learned sparsification, and a new Region‑Bridge‑c topology. At about 30% edge retention, Region‑Bridge‑c achieves the highest mean PR‑AUC and ROC‑AUC while using roughly 69% fewer edges than a dense graph, indicating that graph construction significantly impacts EZ localization performance.

By Daniel Wendelken (University of Cincinnati, Cincinnati, USA), Brian Ervin (Cincinnati Children's Hospital Medical Center, Cincinnati, USA), Ravindra Arya (Cincinnati Children's Hospital Medical Center, Cincinnati, USA), Ali A. Minai (University of Cincinnati, Cincinnati, USA)
Hugging Face Trending Papers
Oct 5

SPDAlign: Interpretable Riemannian Alignment for EEG Forward Modeling Shifts

SPDAlign is an interpretable framework that aligns domain-specific EEG data by applying linear transformations on the Symmetric Positive Definite manifold, correcting mean differences and global rotations across domains using Wasserstein Procrustes. It leverages a generative model of EEG to recover distribution shifts caused by factors like head geometry, and demonstrates competitive performance on extensive public EEG datasets. The method is globally linear, enabling identification of frequency ranges, spatial patterns, and cross-subject variability without requiring labeled calibration data.

arXiv Machine Learning
Oct 28

NOMAD-EEG: Native Omni-Montage Adaptive Diffusion

NOMAD-EEG is a 12‑million‑parameter diffusion model that learns EEG representations independent of electrode number, identity, or recording length by using 3D scalp positions and state‑space layers over time. Trained on 147 h of unlabelled EEG from a single corpus, it outperformed seven larger foundation models across ten datasets, achieving superior accuracy on tasks such as seizure detection, epilepsy diagnosis, motor imagery, and P300 detection. The model’s compact size and single‑corpus training yet strong performance demonstrate the feasibility of a versatile, lightweight EEG foundation model.

By Abdulkader Helwan, Khadidja Henni, Lina Abou-Abbas