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Abstract #0456

Comparable intrinsic spatial profiles of BOLD signals and local field potentials after stimulation and in resting-state within primary somatosensory cortex

Zhaoyue Shi1, Ruiqi Wu1, Pai-Feng Yang1, Feng Wang1, Tung-Lin Wu 1, Arabinda Mishra1, Li Min Chen1, and John Gore1

1Vanderbilt University Institute of Imaging Science, Nashville, TN, United States

We directly compared the spatial extents of stimulated activations and the profiles of inter-voxel resting-state correlations between high resolution BOLD data at 9.4T and local field potentials (LFPs) using 98-channel microelectrode arrays, in functionally distinct somatosensory areas 3b and 1 in monkeys. We found the point spread functions of BOLD and LFP responses were comparable (~1mm) in the stimulus condition, and were more spatially constrained than correlations at rest. Our results showed spatial agreement of resting-state functional connectivity between BOLD and LFP and demonstrated that BOLD responses were as focal as underlying electrical activity.

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