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M. Moosmann, P. Ritter, I. Krastel, A. Brink, S. Thees, F. Blankenburg, B. Taskin, H. Obrig, A. Villringer. Correlates of alpha rhythm in functional magnetic resonance imaging and near infrared spectroscopy. NeuroImage, 20(1):145-158, 2003.


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We used simultaneous electroencephalogram-functional magnetic resonance imaging (EEG-fMRI) and EEG-near infrared spectroscopy (NIRS) to investigate whether changes of the posterior EEG alpha rhythm are correlated with changes in local cerebral blood oxygenation. Cross-correlation analysis of slowly fluctuating, spontaneous rhythms in the EEG and the fMRI signal revealed an inverse relationship between alpha activity and the fMRI-blood oxygen level dependent signal in the occipital cortex. The NIRS-EEG measurements demonstrated a positive cross-correlation in occipital cortex between alpha activity and concentration changes of deoxygenated hemoglobin, which peaked at a relative shift of about 8 s. Our data suggest that alpha activity in the occipital cortex is associated with metabolic deactivation. Mapping of spontaneously synchronizing distributed neuronal networks is thus shown to be feasible


[ Adult ] [ *alpha rhythm ] [ Brain chemistry/*physiology ] [ Electroencephalography ] [ Energy metabolism/physiology ] [ Female ] [ Hemoglobins/metabolism ] [ Human ] [ *magnetic resonance imaging ] [ Male ] [ Oxygen/*blood ] [ Photic stimulation ] [ *spectroscopy ] [ Near-infrared ] [ Support ] [ Non-u.s. gov't ]


M. Moosmann
P. Ritter
I. Krastel
A. Brink
S. Thees
F. Blankenburg
B. Taskin
H. Obrig
A. Villringer

BibTex Reference

   Author = {Moosmann, M. and Ritter, P. and Krastel, I. and Brink, A. and Thees, S. and Blankenburg, F. and Taskin, B. and Obrig, H. and Villringer, A.},
   Title = {Correlates of alpha rhythm in functional magnetic resonance imaging and near infrared spectroscopy},
   Journal = {NeuroImage},
   Volume = {20},
   Number = {1},
   Pages = {145--158},
   Year = {2003}

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