DIVER-1 : Deep Integration of Vast Electrophysiological Recordings at Scale

• URL: http://arxiv.org/abs/2512.19097v1
• Date: Mon, 22 Dec 2025 07:07:43 GMT
• Title: DIVER-1 : Deep Integration of Vast Electrophysiological Recordings at Scale
• Authors: Danny Dongyeop Han, Yonghyeon Gwon, Ahhyun Lucy Lee, Taeyang Lee, Seong Jin Lee, Jubin Choi, Sebin Lee, Jihyun Bang, Seungju Lee, David Keetae Park, Shinjae Yoo, Chun Kee Chung, Jiook Cha,
• Abstract summary: Electrophysiology signals such as EEG and iEEG are central to neuroscience, brain-computer interfaces, and clinical applications.<n>We introduce DIVER-1, a family of EEG and iEEG foundation models trained on the largest and most diverse corpus to date.<n>We present the first systematic scaling law analysis for this domain.<n>For a given amount of data and compute, smaller models trained for extended epochs consistently outperform larger models trained briefly.
• Score: 12.825262947677437
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Electrophysiology signals such as EEG and iEEG are central to neuroscience, brain-computer interfaces, and clinical applications, yet existing foundation models remain limited in scale despite clear evidence that scaling improves performance. We introduce DIVER-1, a family of EEG and iEEG foundation models trained on the largest and most diverse corpus to date-5.3k hours of iEEG and 54k hours of EEG (1.6M channel-hours from over 17.7k subjects)-and scaled up to 1.82B parameters. We present the first systematic scaling law analysis for this domain, showing that they follow data-constrained scaling laws: for a given amount of data and compute, smaller models trained for extended epochs consistently outperform larger models trained briefly. This behavior contrasts with prior electrophysiology foundation models that emphasized model size over training duration. To achieve strong performance, we also design architectural innovations including any-variate attention, sliding temporal conditional positional encoding, and multi-domain reconstruction. DIVER-1 iEEG and EEG models each achieve state-of-the-art performance on their respective benchmarks, establishing a concrete guidelines for efficient scaling and resource allocation in electrophysiology foundation model development.

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