Synchrony and Oscillations EEG-fMRI Group

Focus: Analyzing complex electrophysiological and hemodynamic signals from multiple brain areas, their dynamics and interactions and their relation to mental operations, in particular learning, is the main focus of our group. To this end, we strive for linking theoretical and empirical neuroscience by relating computational model predictions to multimodal experimental data.

The group is part of the Bernstein Focus State Dependencies of Learning, the Bernstein Center for Computational Neuroscience Berlin, and the Berlin Graduate School of Mind and Brain.
We currently receive funding by the German Federal Ministry for Education and Research BMBF.

Workshops co-organized by the group

– BrainModes 2010, December in Copenhagen, Denmark
www.brainmodes.org

– Brain Connectivity Workshop, 1-4 June 2010, Berlin, Germany
www.bccn-berlin.de/bcw10

– EEG-fMRI Workshop, 25 October 2009, Berlin, Germany
www.berlin-neuroimaging-center.de/eegfmri_workshop2009

– BrainModes 2009, 10-13 December, Bristol, UK
www.enm.bris.ac.uk/anm/bm09

– BrainModes 2008, December, Amsterdam, The Netherlands
www.move.vu.nl/links/brainmodes2008/

– BrainModes 2007, November, Berlin, Germany
www.berlin-neuroimaging-center.de/workshop

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Selected Journal Publications

Breakspear M., Daffertshofer A, Ritter P, (2009) Editorial.

Brain Modes: A principled approach to modelling and measuring large-scale neuronal activity. J Neurosci Methods.183(1):1-4

Freyer F, Aquino K, Robinson P, Ritter P, Breakspear M. (2009)

Bistability and non-Gaussian fluctuations in spontaneous cortical activity, Journal of Neuroscience 29(26):8512-24

Reinacher M, Becker R, Villringer A, Ritter P. (2009)

Oscillatory brain states interact with late cognitive components of the somatosensory evoked potential. J Neurosci Methods 183(1):49-56

Nierhaus T, Schön T, Becker R, Ritter P, Villringer A. (2009)

Background and Evoked Activity and ist Interaction in the Human Brain, Journal of Magnetic Resonance Imaging 27(8):1140-50

Ritter P & Becker R (2009)

Detecting Alpha Rhythm Phase Reset by Phase
Sorting: Caveats to Consider, Neuroimage 47(1):1-4

Ritter P, Moosmann M, Villringer A. (2009)

Rolandic Alpha and Beta EEG Rhythms’ Strengths are Inversely Related to fMRI-BOLD Signal in Primary Somatosensory and Motor Cortex. Human Brain Mapping 30(4):1168-87

Ritter P, Freyer F, Curio G, Villringer A. (2008)

High-frequency (600 Hz) population spikes in human EEG delineate thalamic and cortical activation sites. Neuroimage 42(2):483-90

Schubert R, Ritter P, Wüstenberg T, Preuschhof C, Curio G, Sommer W, Villringer A. (2008 in press)

Simultaneous EEG-fMRI reveals correlation of SEPs with BOLD signal in S1 during spatial attention. Cerebral Cortex 18(11):2686-700

Becker R, Ritter P*, Villringer A* (2008)

Influence of Ongoing Alpha Rhythm on the Visual Evoked Potential. Neuroimage. 39(2):707-16 (* shared senior authorship)

Ritter P, Becker R, Graefe C, Villringer A (2007)

Evaluating gradient artifact correction of EEG data acquired simultaneously with fMRI, Journal of Magnetic Resonance Imaging 25(6):923-32

Ritter P, Villringer A (2006)

Simultaneous EEG-fMRI, Neuroscience Biobehav R 30(6):823-38

Becker R, Ritter P, Moosmann M, Villringer A (2005)

Recording of visual evoked potentials during functional magnetic resonance acquisition periods. Human Brain Mapping 26(3):221-30

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 (*shared first authorship)

Blankenburg F, Taskin B, Ruben J, Moosmann M, Ritter P, Curio G, Villringer A (2003)

Imperceptible stimuli and sensory processing impediment. Science 299: 1864

Wobst P (Ritter 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 13: 520-530

Wenzel R, Wobst P (Ritter 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 (Ritter 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

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Books/ Book Chapters

Ritter P, Becker R, Freyer F, Villringer A (2009)

The Image Acquisition Artefact. In C Mulert and L Lemieux, eds EEG-fMRI Physiology, Technique and Application. Springer

Becker R, Ritter P, Villringer A (2009)

Visual System. In C Mulert and L Lemieux, eds EEG-fMRI Physiology, Technique and Application. Springer

Ritter P, Freyer F, Gärtner M, Villringer A (2009)

Bildhafte Wissenspräsentation – Funktionelle Bildgebung mit simultaner EEG-fMRT. In Horst Bredekamp, Matthias Bruhn eds. Bildwelten des Wissens, 6.1: Ikonographie des Gehirns

Ritter P (2004)

Neurovasukläre und neurometabolische Kopplung bei kortikaler
Aktivierung und Deaktivierung (Dissertation), Logos Verlag

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, pp213-222