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High-T-c superconducting quantum interference device recordings of spontaneous brain activity: Towards high-T-c magnetoencephalography

Journal article
Authors Fredrik Öisjöen
Justin F. Schneiderman
Gerard Amoros Figueras
Maxim Chukharkin
Alexei Kalaboukhov
Anders Hedström
Mikael Elam
Dag Winkler
Published in Applied Physics Letters
Volume 100
Issue 13
Pages Article Number: 132601
ISSN 0003-6951
Publication year 2012
Published at Institute of Neuroscience and Physiology
Pages Article Number: 132601
Language en
Keywords field magnetic-resonance, biomagnetic measurements, squid magnetometers, oscillations, system, meg
Subject categories Physical Sciences


We have performed single-and two-channel high transition temperature (high-T-c) superconducting quantum interference device (SQUID) magnetoencephalography (MEG) recordings of spontaneous brain activity in two healthy human subjects. We demonstrate modulation of two well-known brain rhythms: the occipital alpha rhythm and the mu rhythm found in the motor cortex. We further show that despite higher noise-levels compared to their low-T-c counterparts, high-T-c SQUIDs can be used to detect and record physiologically relevant brain rhythms with comparable signal-to-noise ratios. These results indicate the utility of high-T-c technology in MEG recordings of a broader range of brain activity.

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