Новое продвижение в использовании магнитометров с оптической накачкой для детального отслеживания активности коры мозга
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.
the 30 sensors available were arranged to provide coverage of the left and right sensorimotor cortices
Rea, M., Boto, E., Holmes, N., Hill, R., Osborne, J., Rhodes, N., Leggett, J., Rier, L., Bowtell, R., Shah, V., & Brookes, M. J. A 90-channel triaxial magnetoencephalography system using optically pumped magnetometers. Ann NY Acad Sci., 05 September 2022 https://doi.org/10.1111/nyas.14890 (Open Access)
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.
the 30 sensors available were arranged to provide coverage of the left and right sensorimotor cortices
Rea, M., Boto, E., Holmes, N., Hill, R., Osborne, J., Rhodes, N., Leggett, J., Rier, L., Bowtell, R., Shah, V., & Brookes, M. J. A 90-channel triaxial magnetoencephalography system using optically pumped magnetometers. Ann NY Acad Sci., 05 September 2022 https://doi.org/10.1111/nyas.14890 (Open Access)