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Synchrony and Oscillations

EEG-fMRI Group

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 PD Dr. med. Petra Ritter for further information

Workshops

Click here for Brain Modes 2007

Tools

Click here for Tools



Articles

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)

Last modified 03.05.2010 11:22