NDLI: Source Estimation of the K-Complex MEG and Auditory Evoked Fields

Content Provider	IEEE Xplore Digital Library
Author	Iramina, K. Ueno, S.
Copyright Year	1985
Abstract	This study focuses on electrical brain activities during sleep, particularly on K-complexes in normal subjects during sleep stage 2. We investigated the relationship between the sources of K-complexes and the sources of auditory evoked responses. We analyzed these waveforms on the basis of both topographic electroencephalographic (EEG) and magnetoencephalographic (MEG) maps. The components of magnetic fields perpendicular to the surface of the head were measured using a one-channel dc SQUID with a second-order gradiometer or a seven-channel dc SQUID with a first-order gradiometer, and electric potentials were simultaneously recorded at 14 electrodes. On the basis of the MEG measurement results, the source of K-complexeas can be modeled by two current dipoles. The dipoles are estimated to be at a position 10 mm superior to the sources of N100 components of the auditory evoked responses as estimated from the evoked potentials and magnetic fields. This result suggests that the mechanism of K-complexes is closely related to that of auditory evoked responses.
Starting Page	111
Ending Page	115
Page Count	5
File Size	684363
File Format	PDF
ISSN	08824959
Volume Number	9
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1994-05-01
Publisher Place	Hiroshima, Japan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Magnetic field measurement SQUIDs Brain Magnetic analysis Electroencephalography Perpendicular magnetic recording Surface topography Magnetic heads Electric variables measurement Electric potential
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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