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| Home > Departments > Center for Experimental Medicine > Department of Neurophysiology and Pathophysiology > Reasearch Groups > Computational Modeling and BCI

Research Group:

Computational Modeling and BCI

   
Computational Modeling and BCI Logo
   
[head of group:]
  Dr.rer.nat. Alexander Maye
   
[group members:]
  Dr.med. Jens Kleesiek
Doctoral candidate (Dr.rer.nat.),
  Johannes Möller
Diploma student,
  Malte Groth
Bachelor student,
  Malte Sengelmann
Bachelor student,
   
[equipment / methods:]
 
  • 32-channel active electrode EEG systems
  • systems for recording physiological signals like ECG, EMG, temperature, GSR, breathing frequency
  • Robotino robots equipped with an omnidirectional drive, a webcam, and infrared distance sensors
  • Lego Mindstorm robots equipped with a 2-wheel drive, an ultrasound distance sensor, a microphone, and an optic sensor
  • Steady State Visual Evoked Potentials (SSVEP)
  • Motor Imagery
  • Attentional modulation
  • Time-frequency analyses, ICA, PCA
  • Classifiers
  • Artificial Neural Networks (ANN), Recurrent Neural Networks (RNN)
  • Dynamical systems theory

 

[research topics:]
 
  • Brain-Computer Interfaces (BCI)
  • Neurofeedback
  • Computational models of oscillatory brain dynamics
  • Computational models of cognition
  • Computational models of spiking activity in basal ganglia
[Brain-Computer Interfaces (BCI):]
   
[Neurofeedback:]
 
Neurofeedback allows a person to observe his or her own brain activity by
giving visual or auditory feedback. This allows the user to develop strategies
to adjust the own mental activity. This can be employed to bring the person
into a desired cognitive or physiological state (e.g., relaxing), or to
control a computer. Currently we investigate the potential of neurofeedback as
a training method for BCI systems.
   
[Computational models of oscillatory brain dynamics:]
  Oscillatory dynamics of neuronal activity is a commonly observed phenomenon in neurophysiological experiments. The properties of networks of coupled oscillators have been investigated in a number of computational models. Current hypotheses about the functional roles of oscillations consider it as a gating mechanism, a mechanism for modulating sensory processing, or a system of internal reference clocks. Still there are many open questions about mechanisms of information processing in oscillator networks and the role of oscillations for generating behavior. Our projects in this area aim at elucidating computational mechnaisms of oscillatory networks, developing network activity analysis methods, and modelling oscillatory effects found in EEG experiments on size perception.
   
[Computational models of cognition:]
  As part of several cooperations supported by the EU, we are involved in projects implementing robot systems that combine visual and auditory information processing to achieve orienting behaviour, object recognition, navigation, and memory formation. The projects combine a synthetic biorobotics approach with neurophysiological experiments in humans, and computational modeling that allows to identify relevant information processing principles.
   
[Computational models of spiking activity in basal ganglia:]
  In collaboration with the [Basal Ganglia Physiology link] research group we investigate the oscillatory activity of the basal ganglia using computational models. (Patho-)physiological data derived from intraoperative microelectrode recordings from patients suffering from Parkinson's disease are incorporated into the models to obtain biological realistic simulations. Furthermore, e.g. varying neurotransmitter concentration or connectivity of neuron populations can be used to test and valid hypotheses regarding the feedback loop of the diseased basal ganglia.
   
[collaborators:]
 
  • Peter König,
    Dept. of Cognitive Science,  University of Osnabrück
  • Shangkai Gao,
    Dept. of Biomedical Engineering, Tsinghua University, Beijing
  • Markus Werning,
    Dept. of Philosophy & Mercator Research Group, Ruhr University of Bochum
  • Björn Brembs,
    Dept. of Neurobiology, Free University of Berlin
   
   
   
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last update: Eckehard Scharein, 04.01.2010