Magnetic field tomography of cortical and deep processes: Examples of ''real-time mapping'' of averaged and single trial MEG signals

被引：54

作者：

Ioannides, AA

Liu, MJ

Liu, LC

Bamidis, PD

Hellstrand, E

Stephan, KM

机构：

[1] FORSCHUNGSZENTRUM JULICH, RES CTR, INST MED, D-52425 JULICH, GERMANY

[2] KAROLINSKA HOSP, DEPT CLIN NEUROPHYSIOL, S-10401 STOCKHOLM, SWEDEN

[3] HAMMERSMITH HOSP, MRC, CYCLOTRON UNIT, LONDON W12 0HS, ENGLAND

[4] UNIV DUSSELDORF, NEUROL KLIN, D-40225 DUSSELDORF, GERMANY

来源：

INTERNATIONAL JOURNAL OF PSYCHOPHYSIOLOGY | 1995年 / 20卷 / 03期

关键词：

functional brain imaging; evoked potential; MEG; magnetic field tomography; amygdala; hippocampus; auditory odd-ball; interictal epileptic activity; single trial analysis;

D O I：

10.1016/0167-8760(95)00031-3

中图分类号：

B84 [心理学];

学科分类号：

04 ; 0402 ;

摘要：

Magnetic field tomography (MFT) provides 3-dimensional estimates of brain activity, from non-contact, non-invasive measurements of the magnetic field generated by coherent electrical activity in the brain. MFT analysis of averaged auditory ''odd-ball'' data show cortical and deep activation, presumably from the amygdala and hippocampus. These results are compared with MFT estimates obtained from a patient who had undergone lobectomy which removed these structures. The variability from subject to subject is confounded by variability between trials for the same subject; the relationship between the averaged and single trials is probed by bi-hemispheric simultaneous measurements performed under the same odd-ball paradigm and by MFT analysis of auditory evoked data and interictal epileptic activity.

引用

页码：161 / 175

页数：15

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