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- W4294808387 abstract "Magnetoencephalography (MEG) measures the small magnetic fields generated by current flow in neural networks, providing a noninvasive metric of brain function. MEG is well established as a powerful neuroscientific and clinical tool. However, current instrumentation is hampered by cumbersome cryogenic field-sensing technologies. In contrast, MEG using optically pumped magnetometers (OPM-MEG) employs small, lightweight, noncryogenic sensors that provide data with higher sensitivity and spatial resolution, a natural scanning environment (including participant movement), and adaptability to any age. However, OPM-MEG is new and the optimum way to design a system is unknown. Here, we construct a novel, 90-channel triaxial OPM-MEG system and use it to map motor function during a naturalistic handwriting task. Results show that high-precision magnetic field control reduced background fields to ∼200 pT, enabling free participant movement. Our triaxial array offered twice the total measured signal and better interference rejection compared to a conventional (single-axis) design. We mapped neural oscillatory activity to the sensorimotor network, demonstrating significant differences in motor network activity and connectivity for left-handed versus right-handed handwriting. Repeatability across scans showed that we can map electrophysiological activity with an accuracy ∼4 mm. Overall, our study introduces a novel triaxial OPM-MEG design and confirms its potential for high-performance functional neuroimaging." @default.
- W4294808387 created "2022-09-06" @default.
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- W4294808387 date "2022-09-05" @default.
- W4294808387 modified "2023-10-14" @default.
- W4294808387 title "A 90‐channel triaxial magnetoencephalography system using optically pumped magnetometers" @default.
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- W4294808387 doi "https://doi.org/10.1111/nyas.14890" @default.
- W4294808387 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36065147" @default.
- W4294808387 hasPublicationYear "2022" @default.
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