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Anatomical Analysis of the Sources of Somatosensory Evoked Fields (SEFs) using 3D-MRI Kyousuke Kamada 1 , Osamu Oshiro 2 , Fumiya Takeuchi 2 , Shinya Kuriki 3 , Kiyohiro Houkin 3 , Hiroshi Abe 1 1Department of Neurosurgery, Hokkaio University School of Medicine 2Research and Development Division, Sumitomo Metal Industries Ltd 3Research Institute of Applied Electricity, Hokkaido University Keyword: magnetoenchephalography(MEG) , somatosensory evoked field(SEF) , median nerve stimulation , magnetic resonance imaging(MRI) pp.265-270
Published Date 1992/3/1
DOI https://doi.org/10.11477/mf.1406900313
  • Abstract
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We have recorded short latency somatosensory evoked magnetic fields (SEFs) to left median nerve stimulation in three healthy subjects. The locations of the deduced dipole sources were projected onto the 3-Dimensional magetic resonance imaging (3D-MRI) of the individual subjects providing an ana-tomical localization. We found that the deduced sources were located at the primary sensorimotor hand area on the posterior surface of the central sulcus, at an average depth of 26mm (11mm) from the scalp (brain surface) . This technique that com-bined MEG with 3D-MRI was able to precisely determine source locations and analyze the relation-ships between dipole sources and brain structures.


Copyright © 1992, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 2185-405X 印刷版ISSN 0006-8969 医学書院

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