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VERSION:2.0
PRODID:-//Memento EPFL//
BEGIN:VEVENT
SUMMARY:Rhythms for Cognition: Communication through Coherence
DTSTART:20180424T121500
DTEND:20180424T131500
DTSTAMP:20260407T024652Z
UID:6b4f763ce85a4a408176b86daade400b9c0bc309d8fe02c1812b43b3
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof Pascal Fries\, Ernst Strüngmann Institute\, Frankfurt\, 
 GE.\nI will show that continuous optogenetic stimulation of excitatory neu
 rons in visual cortex results in strong gamma-band oscillations\, and resp
 ective white-noise stimulation reveals gamma-band resonance. Corresponding
 ly\, visual stimulation with artificial or natural stimuli induces gamma-b
 and synchronization. Gamma in visual area V4 entails gamma-rhythmic modula
 tion of the gain of spike responses and of behavioral reaction times. Corr
 espondingly\, V1-V4 gamma-band synchronization leads to effective interare
 al communication\, with the typical interareal phase relation resulting in
  the shortest behavioral reaction times. This V1-V4 gamma-band synchroniza
 tion occurs selectively for the attended stimulus\, and is controlled by b
 eta-band influences from parietal onto visual cortex. Generally\, gamma-ba
 nd influences are stronger in the bottom-up and alpha-beta influences stro
 nger in the top-down direction\, which establishes a functional hierarchy 
 of areas both in human and non-human primates. Attention itself samples st
 imuli at a theta rhythm and therefore modulates local and interareal gamma
 -band synchronization.\n\nI will also present some of the technologies tha
 t we developed for this work\, including large-scale high-resolution polyi
 mide electrocorticographic grids\, partly in combination with silicone dur
 a replacements\, insertable multi-contact polyimide depth probes\, and the
  first in-vivo magnetic recordings of neuronal activity\, with spin-electr
 onics based magnetrodes.\n\nBio\nProf. Dr. med. Pascal Fries is scientific
  Member of the Max Planck Society\, Director of the Max Planck Institute f
 or Neurobiology\, Martinsried\, and Director of the Ernst Strüngmann Inst
 itute (ESI) in Cooperation with Max Planck Society\, Frankfurt (since 2009
 ). Professor of Systems Neuroscience\, Radboud University Nijmegen\, Nethe
 rlands (since 2008). Principal Investigator at Donders Institute for Brain
 \, Cognition and Behaviour\, Radboud University\, Nijmegen\, Netherlands (
 2001-2009). Postdoc in the Laboratory of Neuropsychology at the National I
 nstitute 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 Goet
 he University in Frankfurt (1993 – 1998).
LOCATION:Campus Biotech\, H8 Auditorium D https://plan.epfl.ch/?room=H8114
 4.167
STATUS:CANCELLED
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