TY - JOUR
T1 - Visual-evoked magnetic fields associated with geometric and phonetic discrimination
AU - Huang, Shiann Fong
AU - Iramina, Keiji
AU - Yumoto, Masato
AU - Ueno, Shoogo
N1 - Funding Information:
Manuscript received February 14, 2002. This work was supported in part by grants from the Ministry of Education, Culture, Sports, Science and Technology of Japan, and by a Grant-in-Aid for Scientific Research from the Ministry of Education, Science, Sports, and Culture of Japan.
PY - 2002/9
Y1 - 2002/9
N2 - The endogenous negativity of the early negative component of event-related potential or event-related magnetic field might reveal some aspects of cognitive processes. In this paper, we identified the activated area for an early negative component (designated NA) which seems to be associated with pattern recognition processes by measuring the magnetic fields. The difference between the geometric-discriminative response and the phonetic-discriminative response was also obtained. The visual evoked magnetic field was measured with a 204-channel whole-scalp superconducting quantum interference device gradiometer and estimated the equivalent current dipoles (ECD) to clarify the source localization of NA. Localization of a single ECD was applied for the main peak of the NA component in the magnetoencephalogram response. In this paper, the ECD sources were localized in the parietal and temporal sections of the brain.
AB - The endogenous negativity of the early negative component of event-related potential or event-related magnetic field might reveal some aspects of cognitive processes. In this paper, we identified the activated area for an early negative component (designated NA) which seems to be associated with pattern recognition processes by measuring the magnetic fields. The difference between the geometric-discriminative response and the phonetic-discriminative response was also obtained. The visual evoked magnetic field was measured with a 204-channel whole-scalp superconducting quantum interference device gradiometer and estimated the equivalent current dipoles (ECD) to clarify the source localization of NA. Localization of a single ECD was applied for the main peak of the NA component in the magnetoencephalogram response. In this paper, the ECD sources were localized in the parietal and temporal sections of the brain.
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U2 - 10.1109/TMAG.2002.802311
DO - 10.1109/TMAG.2002.802311
M3 - Conference article
AN - SCOPUS:0036762021
VL - 38
SP - 3341
EP - 3343
JO - IEEE Transactions on Magnetics
JF - IEEE Transactions on Magnetics
SN - 0018-9464
IS - 5 I
T2 - 2002 International Magnetics Conference (Intermag 2002)
Y2 - 28 April 2002 through 2 May 2002
ER -