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Abstract #1669

Simultaneous EEG & FMRI: Positive Correlations to Frontal Theta Power

Allen T. Newton1,2, Victoria L. Morgan2,3, John C. Gore1,2

1Biomedical Engineering, Vanderbilt University, Nashville, TN, USA; 2Institute of Imaging Science, Vanderbilt University, Nashville, TN, USA; 3Radiology and Radiological Sciences, Vanderbilt University, Nashville, TN, USA

Frontal midline electroencephalographic (EEG) oscillations in the theta band are known to change during working memory tasks. Negative correlations between frontal midline theta power and default mode BOLD signals have been measured through simultaneous EEG and fMRI data acquisition. This study aims to investigate the positive correlates of theta power. We found several locations of positive correlation, including the left hippocampus and bilateral central sulci. Viewing these results in the context of hippocampal theta and in the context of possible errors in dipole source modeling may affect interpretation of changes in theta oscillations measured along the frontal midline.