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arXiv · 2412.18353

Low count of optically pumped magnetometers furnishes a reliable real-time access to sensorimotor rhythm

Nikita Fedosov·Daria Medvedeva·Oleg Shevtsov·Alexei Ossadtchi
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Abstract

This study presents an analysis of sensorimotor rhythms using an advanced, optically-pumped magnetoencephalography (OPM-MEG) system - a novel and rapidly developing technology. We conducted real-movement and motor imagery experiments with nine participants across two distinct magnetically-shielded environments: one featuring an analog active suppression system and the other a digital implementation. Our findings demonstrate that, under optimal recording conditions, OPM sensors provide highly informative signals, suitable for use in practical motor imagery brain-computer interface (BCI) applications. We further examine the feasibility of a portable, low-sensor-count OPM-based BCI under varied experimental setups, highlighting its potential for real-time control of external devices via user intentions.

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Nikita Fedosov, Daria Medvedeva, Oleg Shevtsov, Alexei Ossadtchi. 2024-12-24. Low count of optically pumped magnetometers furnishes a reliable real-time access to sensorimotor rhythm. https://arxiv.org/abs/2412.18353

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