Abstract #3121
Investigating the electrophysiological fingerprints of spontaneous fMRI activity
Catie Chang 1 , David A Leopold 2 , Marieke L Scholvinck 3 , and Jeff H Duyn 1
1
Advanced MRI Section, Laboratory of
Functional and Molecular Imaging, NINDS, NIH, Bethesda,
MD, United States,
2
Section
on Cognitive Neurophysiology and Imaging, Laboratory of
Neuropsychology, NIMH, MD, United States,
3
Ernst
Strngmann Institute for Neuroscience in Cooperation
with Max Planck Society, Frankfurt am Main, Germany
The neural correlates of spontaneous hemodynamic
fluctuations (resting-state fMRI) are not fully
understood. Using simultaneous LFP-fMRI data acquired
from awake macaques in the resting state, we examined
the relationship between the low (< 8 Hz) and high
(40-80 Hz) frequency bands of the local field potential
in terms of their correlations with the fMRI signal. We
observed that fluctuations in the power of the low and
high frequency bands were weakly correlated with one
another and provided complementary information about
fMRI signals, suggesting that the correlation of LFP
with BOLD arises from at least two distinct processes.
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