Document Detail

Quantitative analysis of spatial sampling error in the infant and adult electroencephalogram.
MedLine Citation:
PMID:  15050554     Owner:  NLM     Status:  MEDLINE    
The purpose of this report was to determine the required number of electrodes to record the infant and adult electroencephalogram (EEG) with a specified amount of spatial sampling error. We first developed mathematical theory that governs the spatial sampling of EEG data distributed on a spherical approximation to the scalp. We then used a concentric sphere model of current flow in the head to simulate realistic EEG data. Quantitative spatial sampling error was calculated for the simulated EEG, with additive measurement noise, for 64, 128, and 256 electrodes equally spaced over the surface of the sphere corresponding to the coverage of the human scalp by commercially available "geodesic" electrode arrays. We found the sampling error for the infant to be larger than that for the adult. For example, a sampling error of less than 10% for the adult was obtained with a 64-electrode array but a 256-electrode array was needed for the infant to achieve the same level of error. With the addition of measurement noise, with power 10 times less than that of the EEG, the sampling error increased to 25% for both the infant and adult, for these numbers of electrodes. These results show that accurate measurement of the spatial properties of the infant EEG requires more electrodes than for the adult.
Philip G Grieve; Ronald G Emerson; Joseph R Isler; Raymond I Stark
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  NeuroImage     Volume:  21     ISSN:  1053-8119     ISO Abbreviation:  Neuroimage     Publication Date:  2004 Apr 
Date Detail:
Created Date:  2004-03-30     Completed Date:  2004-08-06     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  9215515     Medline TA:  Neuroimage     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1260-74     Citation Subset:  IM    
Department of Pediatrics, Columbia University, New York, NY 10032, USA.
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MeSH Terms
Bias (Epidemiology)
Cerebral Cortex / physiology*
Data Collection / statistics & numerical data
Electroencephalography / statistics & numerical data*
Fourier Analysis
Image Processing, Computer-Assisted*
Mathematical Computing
Models, Statistical
Reproducibility of Results
Signal Processing, Computer-Assisted*
Grant Support

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

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