Measurements of extremely low frequency brain magnetic fields associated with four-tone memory processes

Author

Yoshida, Hiroyuki ; Ueno, Shoogo ; Cheyne, Douglas ; Weinberg, Harold

Author_Institution

Dept. of Comput. Sci. & Commun. Eng., Kyushu Univ., Fukuoka, Japan

Volume

31

Issue

6

fYear

1995

fDate

11/1/1995 12:00:00 AM

Firstpage

4268

Lastpage

4270

Abstract

Recently magnetic-field measurements of the brain have become a useful tool to study higher brain function. The purpose of this study is to propose source models of both the memorizing process and the recognition process. The components of magnetic fields perpendicular to the surface of the head were measured by using a whole cortex type of DC SQUID with a third-derivative gradiometer. The authors observed the extremely slow components of MEG activities during both the memorizing process and the recognition process. They estimated the sources using two current dipoles, and compared the two cases

Keywords

hearing; magnetoencephalography; current dipoles; extremely low frequency brain magnetic fields; extremely slow MEG components; four-tone memory processes; head surface; higher brain function study tool; magnetic fields components; memorizing process; recognition process; third-derivative gradiometer; whole cortex type DC SQUID; Biomedical engineering; Computer science; Conductors; Frequency measurement; Laboratories; Magnetic field measurement; Magnetic heads; Perpendicular magnetic recording; SQUIDs; Surface topography;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.489948

Filename

489948