Abstract #4142
Frequency Correspondence between fMRI and EEG signals before and after Sleep
Yu-Ting Ko 1 , Pai-Chuan Hung 1 , Geng-Hong Lin 1 , Pei-Jung Tsai 2 , Ching-Po Lin 3 , and Changwei W Wu 1
1
Graduate Institute of Biomedical
Engineering, National Central Unversity, Taoyuan,
Taiwan,
2
Department
of Biomedical Imaging and Radiological Sciences,
National Yang-Ming University, Taipei, Taiwan,
3
Institute
of Neuroscience, Nation Yang-Ming University, Taipei,
Taiwan
The resting-state fMRI signal is the baseline
fluctuations with non-linear and non-stationary
properties; thus its underlying mechanism was quite
fussy. From the frequency viewpoints, we attempted to
retrieve its physiological implications by observing the
frequency correspondence between fMRI and EEG.
Therefore, we simultaneously recorded fMRI and EEG
signals in 2 conditions (before and after sleep) and
used the Hilbert-Huang Transform to extract their
spectral correspondence. In our results, we found the
opposite frequency correspondences between EEG and fMRI
in the resting state, especially in the low frequency
range, resembling previous studies. Furthermore, such
correspondence deviates in different physiological
conditions.
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