MEG Measurements and Analysis of MEG Activities Associated with the Short-term Memory and Identification tasks

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 on the brain during both memory and identification tasks. 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. We observed the extremely slow components of MEG activities during both the memory and identification tasks. We estimated the sources using two current dipoles, and compared the two cases.