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MEG (magnetoencephalography)
Also known as: Magnetoencephalography, OPM-MEG
Measures the tiny magnetic fields produced by brain activity. Fast like EEG, with better spatial detail.
Traditional MEG needs supercooled sensors in a magnetically shielded room. Newer optically pumped magnetometers (OPMs) work at room temperature and can be worn as a helmet, which may make MEG-based BCIs practical.
Last updated Sep 30, 2026. Educational content, not medical advice.