TY - JOUR
T1 - Source Estimation of the K-Complex MEG and Auditory Evoked Fields
AU - Iramina, K.
AU - Ueno, S.
N1 - Funding Information:
severaltensoftimes greater. The results of this work have shown that the K-complex sources are located close to the NI00 source, but the relation between the two, and the mechanism of ThesourceoccurrenceofK-complexes,ofofareasyettheNI00unknown. production evoked component through auditory response changes from moment to moment[16]. In the future,evokeddetailedinvestigationandofthesourcesof auditory responses K-complexes throughlatency times shouldprovide clues to the This researchwasmechanismofoccurrenceofK-complexes.in a supported part by grant from the Ministry of Education ((A) (1)03505002).
PY - 1994
Y1 - 1994
N2 - 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-complexes 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.
AB - 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-complexes 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.
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U2 - 10.1109/TJMJ.1994.4565867
DO - 10.1109/TJMJ.1994.4565867
M3 - Article
AN - SCOPUS:0028441866
SN - 0882-4959
VL - 9
SP - 111
EP - 115
JO - IEEE Translation Journal on Magnetics in Japan
JF - IEEE Translation Journal on Magnetics in Japan
IS - 3
ER -