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Measurement of spinal cord evoked magnetic fields by vector SQUID biomagnetometer
Author(s) -
Adachi Yoshiaki,
Miyamoto Masakazu,
Kawai Jun,
Uehara Gen
Publication year - 2006
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.20277
Subject(s) - squid , magnetic field , spinal cord , physics , magnetometer , acoustics , biomagnetism , superconductivity , field (mathematics) , electrical engineering , nuclear magnetic resonance , electronic engineering , condensed matter physics , neuroscience , engineering , biology , mathematics , quantum mechanics , ecology , pure mathematics
Biomagnetometry is a powerful method for the investigation of neural activity. We developed a multichannel superconducting quantum interference device (SQUID) biomagnetometer system for measurement of the evoked magnetic field from stimulated spinal cords. The system is equipped with three dimensionally configured SQUID vector gradiometers, which can detect not only the radial components of the magnetic field applied to the subject but also the tangential components. With the system, we could successfully observe the distribution of the evoked magnetic field corresponding to neuronal signals propagating in the spinal cords of small animals in the form of momentarily changing vector maps. © 2006 Wiley Periodicals, Inc. Electr Eng Jpn, 157(2): 15–23, 2006; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/eej.20277