Synchrony and Oscillations
The goal of the EEG-fMRI group is to observe electrical and hemodynamic activities in multiple brain areas, its dynamics and interactions and its relation to mental operations. Particularly, we explore the role of neuronal synchrony and oscillations for cerebral information processing.
Focuses
- MRI correlates of spontaneous EEG-rhythms during rest
- Simultaneous effects of spontaneous EEG rhythms and functional task on fMRI blood oxygenation level dependent (BOLD) signal
- Simultaneous acquisition of high frequency oscillations indexing action-potential timing, somatosensory evoked potentials (SEPs) and fMRI
- Relation of ongoing activity and evoked activity in EEG and fMRI Vigilance classification for continuous vigilance monitoring during fMRI
Clinical Application
- Simultaneous EEG-fMRI in patients with hepatic encephalopathia
Methods
- Electroencephalography (EEG)
- Surface Electromyography (EMG)
- Functional Magnetic Resonsce Imaging (fMRI)
- Near Infrared Spectroscopy (NIRS)
- Simultaneous EEG-fMRI
Contact
Please contact Dr. med. Petra Ritter for further informationWorkshops
Click here for Brain Modes 2007Tools
Click here for ToolsArticles
| 2008 |
Becker R, Ritter P, Villringer A (2008) Influence of ongoing alpha rhythm on the visual evoked potential. Neuroimage.
39(2):707-16 |
| 2007 |
Ritter P, Becker R, Graefe C, Villringer A (2007) Evaluating gradient artifact correction of EEG data acquired simultaneously with fMRI. Magn Reson Imaging.
25(6):923-32 |
| 2006 |
Ritter P, Villringer A (2006) Simultaneous EEG-fMRI. Neurosci Biobehav Rev.
30(6): 823-38 |
| 2005 |
Becker R, Ritter P, Moosmann M, Villringer A (2005) Recording
of visual evoked potentials during functional magnetic resonance
acquisition periods. Human Brain Mapping
20: 145-158 |
| 2003 | Moosmann
M, Ritter P, Krastel I, Brink A, Thees S, Blankenburg F,
Taskin B, Obrig H, Villringer A (2003) Correlates of alpha
rhythm in functional magnetic resonance imaging and near
infrared spectroscopy. Neuroimage
20: 145-158 |
| Blankenburg
F, Taskin B, Ruben J, Moosmann M, Ritter P, Curio G, Villringer
A (2003) Imperceptible stimuli and sensory processing impediment.
Science
299: 1864 |
|
| 2002 | Ritter
P, Villringer A (2002) Inhibition and functional magnetic
resonance imaging. In M Tomita, I Kanno, E Hamel, eds Brain
Activation and CBF Control, Ed. first. Elsevier, pp 213-222
|
| 2001 | Wobst
P, Wenzel R, Kohl M, Obrig H, Villringer A (2001) Linear
Aspects of Changes in Deoxygenated Hemoglobin Concentration
and Cytochrome Oxidase Oxidation during Brain Activation.
Neuroimage
2001 Mar ;13 (3 ):520 -530 |
| 2000 | Wenzel
R, Wobst P, Heekeren HH, Kwong KK, Brandt SA, Kohl M, Obrig
H, Dirnagl U, Villringer A (2000) Saccadic suppression induces
focal hypooxygenation in the occipital cortex. J
Cereb Blood Flow Metab 7: 1103-1110 |
|
Obrig
H, Wenzel R, Kohl M, Horst S, Wobst P, Steinbrink J, Thomas
F, Villringer A (2000) Near-infrared spectroscopy: does
it function in functional activation studies of the adult
brain?
Int J Psychophysiol 35: 125-142
|
Abstracts/Posters
2006
Ritter P, Freyer F, Curio G, Villringer A (2006) Spiking Activity Correlates with the BOLD Signal in Primary Somatosensory Cortex 12th Annual Meeting HBM, Florence
(PDF)
Freyer F, Ritter P, Becker R, Anami K, Curio G, Villringer A (2006) Recording of Ultrafast (600 Hz) EEG Oscillations with Amplitudes in the Nanovolt Range during fMRI acquisition periods 12th Annual Meeting HBM, Florence
(PDF)
Ritter P, Freyer F, Becker R, Anami K, Curio G, Villringer A (2006) Recording of Ultrafast (600 Hz) EEG Oscillations with Amplitudes in the Nanovolt Range during fMRI acquisition periods 14th scientific meeting ISMRM, Seattle
(PDF)
2005
Ritter P, Schweder H, Wüstenberg T, Villringer A (2005) Automated Vigilance Classification Based on Electroencephalographic and -oculographic Signatures 35th Annual Meeting SFN, Washington
(PDF)
Ritter P, Moosmann M, Villringer A (2005) FMRI Correlates of Pathologically Changed Alpha Rhythm in Patients with Hepatic Encephalopathy 11th Annual Meeting HBM, Toronto
(PDF)
Freyer F, Ritter P, Moosmann M, Curio G, Villringer A (2005) Modulation of Cortical Spike Bursts Can be Measured during fMRI 11th Annual Meeting HBM, Toronto
(PDF)
Becker R, Ritter P, Villringer A (2005) VEPs, Time Course of Event Related Desynchronization and Recovery of Spontaneous Alpha during Eyes Closed and Eyes Open 11th Annual Meeting HBM, Toronto
(PDF)
Schubert R, Ritter P, Wüstenberg T, Sommer W, Villringer A (2005) Cortical Activation Patterns of Tactile Spatial Attention 11th Annual Meeting HBM, Toronto
(PDF)
2004
Ritter P, Moosmann M, Freyer F, Curio G, Villringer A (2004) High Frequency Oscillations in Human Somatosensory Evoked Potentials during Simultaneous EEG and FMRI Recordings 34th Annual Meeting SFN, San Diego
(PDF)
Moosmann M, Ritter P, Villringer A (2004) Imaging of Network Activities for Eye Closure in Darkness and Concurrent Alpha-Band Modulation 34th Annual Meeting SFN, San Diego
(PDF)
Ritter P, Moosmann M, Villringer A (2004) Resting-Brain EEG-Rhythms in fMRI 10th Annual Meeting HBM, Budapest
(PDF)
Moosmann M, Ritter P, Villringer A (2004) FMRI Correlates of Fast and Slow Alpha-Rhythm Fluctuations during Total Darkness 10th Annual Meeting HBM, Budapest
(PDF)
Becker R, Ritter P, Moosmann M, Villringer A (2004) Analysis of Single Trial Visual Evoked Potentials during Simultaneous fMRI 10th Annual Meeting HBM, Budapest
(PDF)
Moosmann M, Ritter P, Steinbrink J, Villringer A (2004) Simultaneous Multimodal Acquisition of Surface-EMG, EEG and fMRI 12th scientific meeting ISMRM, Kyoto (PDF)
Zurborg S, Tysiak E, Ritter P, Moosmann M, Wüstenberg T, Villringer A (2004) Automatic Classification of Vigilance Stages in Wakeful Subjects - A First Step towards Finding fMRI-Correlates of Vigilance BNF, Liebenwalde
(PDF)
2003
Ritter P, Moosmann M, Krastel I, Villringer A (2003) Correlates of the Human Mu-Rhythm in fMRI 33th Annual Meeting SFN, New Orleans
(PDF)
Moosmann M, Ritter P, Villringer A (2003) Visual Evoked Potentials during fMRI Acquisition Periods 33th Annual Meeting SFN, New Orleans
(PDF)
