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VERSION:2.0
PRODID:-//Memento EPFL//
BEGIN:VEVENT
SUMMARY:Rhythms for Cognition: Communication through Coherence
DTSTART:20181120T121500
DTEND:20181120T131500
DTSTAMP:20260406T232505Z
UID:53d58b2723e7354ab6333b91e45f90ce6660a0be48014f7de28e2997
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof Pascal Fries\, Ernst Strüngmann Institute\, Frankfurt\, 
 GE\nI will show that continuous optogenetic stimulation of excitatory neur
 ons in visual cortex results in strong gamma-band oscillations\, and respe
 ctive white-noise stimulation reveals gamma-band resonance. Correspondingl
 y\, visual stimulation with artificial or natural stimuli induces gamma-ba
 nd synchronization. Gamma in visual area V4 entails gamma-rhythmic modulat
 ion of the gain of spike responses and of behavioral reaction times. Corre
 spondingly\, V1-V4 gamma-band synchronization leads to effective interarea
 l communication\, with the typical interareal phase relation resulting in 
 the shortest behavioral reaction times. This V1-V4 gamma-band synchronizat
 ion occurs selectively for the attended stimulus\, and is controlled by be
 ta-band influences from parietal onto visual cortex. Generally\, gamma-ban
 d influences are stronger in the bottom-up and alpha-beta influences stron
 ger in the top-down direction\, which establishes a functional hierarchy o
 f areas both in human and non-human primates. Attention itself samples sti
 muli at a theta rhythm and therefore modulates local and interareal gamma-
 band synchronization. I will also present some of the technologies that we
  developed for this work\, including large-scale high-resolution polyimide
  electrocorticographic grids\, partly in combination with silicone dura re
 placements\, insertable multi-contact polyimide depth probes\, and the fir
 st in-vivo magnetic recordings of neuronal activity\, with spin-electronic
 s based magnetrodes.\n\nBio\nProf. Dr. med. Pascal Fries is scientific Mem
 ber of the Max Planck Society\, Director of the Max Planck Institute for N
 eurobiology\, Martinsried\, and Director of the Ernst Strüngmann Institut
 e (ESI) in Cooperation with Max Planck Society\, Frankfurt (since 2009). P
 rofessor of Systems Neuroscience\, Radboud University Nijmegen\, Netherlan
 ds (since 2008). Principal Investigator at Donders Institute for Brain\, C
 ognition and Behaviour\, Radboud University\, Nijmegen\, Netherlands (2001
 -2009). Postdoc in the Laboratory of Neuropsychology at the National Insti
 tute of Mental Health\, Bethesda\, MD\, USA (1999 – 2001). Doctorate at 
 the Max Planck Institute for Brain Research and at the Johann Wolfgang von
  Goethe University in Frankfurt (1993 – 1999). Study of medicine at the 
 University of Saarland (1991-1993) and at the Johann Wolfgang von Goethe U
 niversity in Frankfurt (1993 – 1998).
LOCATION:Campus Biotech\, H8 Auditorium D https://plan.epfl.ch/?room=H8114
 4.167
STATUS:CONFIRMED
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