EEG-correlated fMRI of human alpha activity. Export

@article{citeulike:876898, abstract = {Electroencephalography-correlated functional magnetic resonance imaging (EEG/fMRI) can be used to identify blood oxygen level-dependent (BOLD) signal changes associated with both physiological and pathological EEG events. Here, we implemented continuous and simultaneous EEG/fMRI to identify BOLD signal changes related to spontaneous power fluctuations in the alpha rhythm (8-12 Hz), the dominant EEG pattern during relaxed wakefulness. Thirty-two channels of EEG were recorded in 10 subjects during eyes-closed rest inside a 1.5-T magnet resonance (MR) scanner using an MR-compatible EEG recording system. Functional scanning by echoplanar imaging covered almost the entire cerebrum every 4 s. Off-line MRI artifact subtraction software was applied to obtain continuous EEG data during fMRI acquisition. The average alpha power over 1-s epochs was derived at several electrode positions using a Fast Fourier Transform. The power time course was then convolved with a canonical hemodynamic response function, down-sampled, and used for statistical parametric mapping of associated signal changes in the image time series. At all electrode positions studied, a strong negative correlation of parietal and frontal cortical activity with alpha power was found. Conversely, only sparse and nonsystematic positive correlation was detected. The relevance of these findings is discussed in view of the current theories on the generation and significance of the alpha rhythm and the related functional neuroimaging findings.}, address = {Department of Neurology, Johann Wolfgang Goethe-University, Theodor-Stern-Kai 7, 60590 Frankfurt am Main, Germany. helmut@laufs.com}, author = {Laufs, H. and Kleinschmidt, A. and Beyerle, A. and Eger, E. and Salek-Haddadi, A. and Preibisch, C. and Krakow, K.}, citeulike-article-id = {876898}, citeulike-linkout-0 = {http://view.ncbi.nlm.nih.gov/pubmed/12948703}, citeulike-linkout-1 = {http://www.hubmed.org/display.cgi?uids=12948703}, issn = {1053-8119}, journal = {NeuroImage}, keywords = {alpha, eeg, fmrt}, month = {August}, number = {4}, pages = {1463--1476}, posted-at = {2007-05-09 22:34:01}, priority = {2}, title = {EEG-correlated fMRI of human alpha activity.}, url = {http://view.ncbi.nlm.nih.gov/pubmed/12948703}, volume = {19}, year = {2003} }

TY - JOUR ID - citeulike:876898 L3 - citeulike-article-id:876898 N2 - Electroencephalography-correlated functional magnetic resonance imaging (EEG/fMRI) can be used to identify blood oxygen level-dependent (BOLD) signal changes associated with both physiological and pathological EEG events. Here, we implemented continuous and simultaneous EEG/fMRI to identify BOLD signal changes related to spontaneous power fluctuations in the alpha rhythm (8-12 Hz), the dominant EEG pattern during relaxed wakefulness. Thirty-two channels of EEG were recorded in 10 subjects during eyes-closed rest inside a 1.5-T magnet resonance (MR) scanner using an MR-compatible EEG recording system. Functional scanning by echoplanar imaging covered almost the entire cerebrum every 4 s. Off-line MRI artifact subtraction software was applied to obtain continuous EEG data during fMRI acquisition. The average alpha power over 1-s epochs was derived at several electrode positions using a Fast Fourier Transform. The power time course was then convolved with a canonical hemodynamic response function, down-sampled, and used for statistical parametric mapping of associated signal changes in the image time series. At all electrode positions studied, a strong negative correlation of parietal and frontal cortical activity with alpha power was found. Conversely, only sparse and nonsystematic positive correlation was detected. The relevance of these findings is discussed in view of the current theories on the generation and significance of the alpha rhythm and the related functional neuroimaging findings. IS - 4 JF - NeuroImage SN - 1053-8119 AD - Department of Neurology, Johann Wolfgang Goethe-University, Theodor-Stern-Kai 7, 60590 Frankfurt am Main, Germany. helmut@laufs.com EP - 1476 TI - EEG-correlated fMRI of human alpha activity. VL - 19 SP - 1463 KW - alpha KW - eeg KW - fmrt AU - Laufs, H AU - Kleinschmidt, A AU - Beyerle, A AU - Eger, E AU - Salek-Haddadi, A AU - Preibisch, C AU - Krakow, K PY - 2003/08// UR - http://view.ncbi.nlm.nih.gov/pubmed/12948703 ER -