| Literature DB >> 18057502 |
Apostolos P Georgopoulos1, Elissaios Karageorgiou, Arthur C Leuthold, Scott M Lewis, Joshua K Lynch, Aurelio A Alonso, Zaheer Aslam, Adam F Carpenter, Angeliki Georgopoulos, Laura S Hemmy, Ioannis G Koutlas, Frederick J P Langheim, J Riley McCarten, Susan E McPherson, José V Pardo, Patricia J Pardo, Gareth J Parry, Susan J Rottunda, Barbara M Segal, Scott R Sponheim, John J Stanwyck, Massoud Stephane, Joseph J Westermeyer.
Abstract
We report on a test to assess the dynamic brain function at high temporal resolution using magnetoencephalography (MEG). The essence of the test is the measurement of the dynamic synchronous neural interactions, an essential aspect of the brain function. MEG signals were recorded from 248 axial gradiometers while 142 human subjects fixated a spot of light for 45-60 s. After fitting an autoregressive integrative moving average (ARIMA) model and taking the stationary residuals, all pairwise, zero-lag, partial cross-correlations (PCC(ij)(0)) and their z-transforms (z(ij)(0)) between i and j sensors were calculated, providing estimates of the strength and sign (positive, negative) of direct synchronous coupling at 1 ms temporal resolution. We found that subsets of z(ij)(0) successfully classified individual subjects to their respective groups (multiple sclerosis, Alzheimer's disease, schizophrenia, Sjögren's syndrome, chronic alcoholism, facial pain, healthy controls) and gave excellent external cross-validation results.Entities:
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Year: 2007 PMID： 18057502 DOI： 10.1088/1741-2560/4/4/001
Source DB: PubMed Journal: J Neural Eng ISSN： 1741-2552 Impact factor: 5.379