Petra Ritter (née Wobst)

Portrait

Priv.-Doz.

Head Independent Research Group Brain Modes

Office: Department of Neurology, Charité, Charitéplatz 1, 10117 Berlin
Room: 2511.04.017

Phone: 49-30-450-560005
EMail: petra.ritter-please remove this text-@charite.de


Focus

The brain is a highly adaptive, self-organizing complex system, which has evolved such that neuronal responses and related behavior are continuously optimized with respect to the external and internal context. This capability is achieved by the modulation of neuronal interactions depending on the history of previously processed information. Such meaningful connectivity changes, together with stochastic processes influence ongoing neuronal dynamics. The role of such state-dependent fluctuations may be one of the fundamental computational properties of the brain, being pervasively present in human behavior and leaving a distinctive fingerprint in neuroscience data. By combining advanced multimodal neuroimaging and computational modeling we aim to identify generative mechanisms of ongoing neuronal dynamics and to elucidate principles of interaction between ongoing dynamics and incoming events or tasks.

 

Methodological Developments

The Virtual Brain
Ultrafast EEG-fMRI
EEG-neurofeedback during fMRI
Combined 3D-spatial and temporal wavelet analysis

 

Group Members

Dipanjan Roy, PhD
Rodrigo Sigala, PhD
Michael Schirner, M.Sc.
Sebastian Haufe, M.Sc.
Simon Rothmeier, B.Sc.
Henrik Matzke, B.Sc.
Paul Triebkorn, cand. med.
Jonas Schwarz, cand. med.
Jessica Palmer, media artist

 

Links

Bernstein Focus State Dependencies of Learning http://www.bfnl-state-dependencies.de/
Brain Network Recovery Group http://www.brainnrg.org/index.php?section=795
The Virtual Brain http://thevirtualbrain.org/
Annual BrainModes Workshop http://www.brainmodes.org/
Brain Connectivity Workshop http://www.brain-connectivity-workshop.org/

 

Funding


Short Curriculum Vitae

W2 appointment, Independent Research Group Leader MPI for Human Cognitive and Brain Sciences Leipzig with lab located at Dept. Neurology, Charité Berlin (since 2011); Principal Investigator, Brain Network Recovery Group, Coordinator AR McIntosh (since 2011); Habilitation, Charité, Berlin, Germany (2011); Coordinator Bernstein Focus State Dependencies of Learning with R. Kempter (since 2009); PI at the Bernstein Center for Computational Neuroscience Berlin (since 2009); Basis Qualification Clinical Investigator (2008); Qualification in Clinical Electrophysiology (2006); Distance study - part-time, Mathematics for Physicists, TU Kaiserslautern (2005-2007); Research Group Leader Synchrony and Oscillations EEG-fMRI Group at Berlin Neuroimaging Center, Head A. Villringer, Charité, Berlin (2005-2010); PhD Charitè, Berlin, summa cum laude (2004); License to practice medicine “Approbation”, Berlin (2002); Resident at Dept. Neurology, Charité, Berlin (since 2001); Medical Doctor, Charité, Berlin (2000); Medical internships in the US at UCSD, UCLA, MSSM and Harvard Medical School (1999-2000); United States Medical Licensing Exam Step-1 (1998); Four medical clerkships in the US (1995-1998); Medical School, Charité, Berlin (1994-2000)


Selected Publications

Ritter, P., M. Schirner, A.R. McIntosh, V. Jirsa (2013). "The virtual brain integrates computational modeling and multimodal neuroimaging." Brain Connect 3(2):
121-145.

Freyer, F., R. Becker, Dinse, H., Ritter, P. (2012). State-dependent
perceptual learning. J. Neuroscience 33(7):2900-7.

Freyer, F., Roberts, J. A., Ritter, P., & Breakspear, M. (2012). A
canonical model of multistability and scale-invariance in biological
systems. PLoS Computational Biology, 8(8)

Freyer F, Reinacher M, Nolte G, Dinse HR, Ritter P (2012) Short-term
repetitive sensory stimulation leads to changes in alpha-band
resting-state functional connectivity – implications for treatment of
sensorimotor decline. Frontiers in Human Neuroscience 6:144

Becker R, Reinacher M, Freyer F, Villringer A, Ritter P (2011) How
ongoing neuronal oscillations account for variability of evoked fMRI
responses J. Neuroscience 31(30):11016-27

Freyer F, Roberts JA, Becker R, Robinson P, Ritter P, Breakspear M
(2011) Biophysical mechanisms of multistability in resting-state
cortical rhythms. J. Neuroscience 31(17):6353-61

Schultze-Kraft M, Becker R, Breakspear M, Ritter P, (2010) Exploiting
the potential of three dimensional spatial wavelet analysis to explore
the nesting of oscillations and spatial variance in simultaneous
EEG-fMRI data. Progress in Biophysics and Molecular Biology. 105(1-2):67-79

Freyer F, Aquino K, Robinson P, Ritter P, Breakspear M. (2009)
Non-Gaussian statistics in temporal fluctuations of spontaneous cortical
activity. J. 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

Freyer F, Becker R, Anami K, Curio G, Villringer A, Ritter P. (2009)
Ultrahigh-frequency EEG during fMRI: Pushing the limits of
imaging-artifact correction. Neuroimage 48(1):94-108

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.

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) Simultaneous EEG-fMRI reveals correlation of SEPs
with BOLD signal in S1 during spatial attention. Cerebral Cortex.

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, Villringer A (2006) Simultaneous EEG-fMRI, Neuroscience
Biobehav R 30(6):823-38

Blankenburg F, Taskin B, Ruben J, Moosmann M, Ritter P, Curio G,
Villringer A (2003) Imperceptible stimuli and sensory processing
impediment. Science 299: 1864