Abstract #2107
Contribution of A Brain-state Specific Neurophysiological Event to Large-scale fMRI Signal Fluctuations
Xiao Liu 1 , Toru Yanagawa 2 , David A Leopold 3 , Marieke Schlvinck 4 , Catie Chang 1 , Hiroaki Ishida 5 , Naotaka Fujji 2 , and Jeff H. Duyn 1
1
AMRI, LFMI, NINDS, NIH, Bethesda, MD, United
States,
2
BSI,
RIKEN, Saitama, Japan,
3
Laboratory
of Neuropsychology, NIMH, NIH, Bethesda, MD, United
States,
4
Ernst
Strngmann Institute for Neuroscience, Frankfurt,
Hessen, Germany,
5
Tokyo
Metropolitan Institute of Medical Science, Tokyo, Japan
To investigate the neural correlate of large-scale
signal fluctuation in resting state fMRI (rsfMRI) and
understand its relationship to brain state, we examined
the ECoG power recorded from large electrode grids in
macaques during eyes-open, eyes-closed wakefulness, and
sleep conditions. We observed a brain-state-sensitive,
stereotypical event whose spatiotemporal characteristics
resembled the rsfMRI characteristics. With an
independent dataset of concurrent fMRI-electrophysiology,
we further confirmed that the identified events were
directly associated with global changes in resting-state
fMRI signal.
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