A COMPARISON OF THE LOCALIZATION OF SPONTANEOUS NEUROMAGNETIC ACTIVITY IN THE FREQUENCY AND TIME DOMAINS

被引：23

作者：

TESCHE, C

KAJOLA, M

机构：

[1] Low Temperature Laboratory, Helsinki University of Technology

来源：

ELECTROENCEPHALOGRAPHY AND CLINICAL NEUROPHYSIOLOGY | 1993年 / 87卷 / 06期

基金：

芬兰科学院;

关键词：

SPONTANEOUS ACTIVITY; FFT DIPOLE SOURCE LOCALIZATION; BRAIN MAPPING; MAGNETOENCEPHALOGRAPHY; ELECTROENCEPHALOGRAPHY; (HUMAN);

D O I：

10.1016/0013-4694(93)90155-O

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 ;

摘要：

We investigated the localization of current sources for spontaneous magnetoencephalographic data in the frequency and lime domains. The two analysis techniques yielded complementary information about the underlying neuronal generators. Phase-coherent sources for occipital 10 Hz alpha band activity were identified in the frequency domain from the dependence of the equivalent current dipole strengths on the phase of the Fourier transform. Source localization in both the frequency and time domains was used to analyze data containing interictal spike and slow-wave activity. Predominantly 2-6 Hz spectral components localized in the frequency domain were found within an 8 cm(3) volume centered at the time-domain source location of the spike. In general, the characteristics of the noise sources in magnetoencephalographic systems favor the use of frequency-domain analysis for rhythmic spontaneous activity.

引用

页码：408 / 416

页数：9

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