Document Detail

A comparison of the localization of spontaneous neuromagnetic activity in the frequency and time domains.
MedLine Citation:
PMID:  7508374     Owner:  NLM     Status:  MEDLINE    
We investigated the localization of current sources for spontaneous magnetoencephalographic data in the frequency and time 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 cm3 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.
C Tesche; M Kajola
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Electroencephalography and clinical neurophysiology     Volume:  87     ISSN:  0013-4694     ISO Abbreviation:  Electroencephalogr Clin Neurophysiol     Publication Date:  1993 Dec 
Date Detail:
Created Date:  1994-03-15     Completed Date:  1994-03-15     Revised Date:  2008-09-09    
Medline Journal Info:
Nlm Unique ID:  0375035     Medline TA:  Electroencephalogr Clin Neurophysiol     Country:  IRELAND    
Other Details:
Languages:  eng     Pagination:  408-16     Citation Subset:  IM    
Low Temperature Laboratory, Helsinki University of Technology, Espoo, Finland.
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MeSH Terms
Brain / physiology*
Brain Mapping
Magnetoencephalography / methods*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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