100211 Jerbi
The Bernstein Center Freiburg Bernstein Seminar
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Karim Jerbi
Brain Dynamics & Cognition, INSERM U821
Lyon, France Large-scale brain dynamics of
perceptuo-motor behavior: Insights from MEG and intracerebral EEG and implications for future Brain Computer Interfaces | |
Thursday, February 11, 2010 17:15 h |
Lecture Hall (ground floor) BCCN building Hansastraße 9A 79104 Freiburg |
Abstract:
Local and long-distance neural synchonization play a key role in mediating sensorimotor behavior. Although neuroimaging studies continue to play a fundamental role in the study of large-scale perceptuo-motor networks, the fine-scale temporal and oscillatory properties of such networks need to be investigated with high (millisecond) temporal resolution. I will present data using invasive and non-invasive electrophysiological techniques that investigate oculomotor behavior and visuomotor control. First, using Magnetoencephalography (MEG) we address the role of cerebral oscillations and long-range cortico-cortical coupling in mediating continuous visuomotor control. Beyond providing direct links between cortical activity and hand movement kinematics, our data reveal task-specific modulations of large-scale parieto-frontal activations across multiple frequency bands. In a separate study, we used stereotactic-EEG (SEEG) to record directly from various brain structures in implanted epilepsy patients while they performed a delayed saccade paradigm. The unique human intracranial findings we report suggest that high frequency activity in the gamma range (60-140 Hz) and long-range coupling (in alpha/beta range) might play a fundamental role in oculomotor planning as well as in a series of intricately related neural processes such as visuomotor transformation and visuo-spatial attention. Finally, we will present our real-time brain power visualization platforms: Brain TV and Brain Ball and discuss possible implications of our findings in the context of brain computer interfaces and neurofeedback applications. Some related Refs: |
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Host: Jörn Rickert |
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The talk is open to the public. Guests are cordially invited!
www.bcf.uni-freiburg.de |