Bernstein Seminar
You have a new invitation for the Special Bernstein Lecture on 24 October 2017!

October 24, 2017

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Laboratory for Computational Neuroscience

Unité de Neurosciences, Information & Complexité (UNIC)
Centre National de la Recherche Scientifique (CNRS)
Gif-sur-Yvette, France

Tuesday, 24 October 2017

 

17:15 hours

 

vCal iCal

 

Bernstein Center Freiburg

Lecture Hall
Hansastr. 9a
79104 Freiburg

 

Hosted by Stefan Rotter

PROPAGATING WAVES AND THEIR COLLISIONS IN VISUAL CORTEX

Propagating waves have been found in cerebral cortex during anesthesia, sleep or in awake animals. We show here that such waves are found in the primary visual cortex of awake monkey, and could be demonstrated from voltage-sensitive dye (VSD) imaging. Further experiments showed that the collision of two propagating waves produces a combined wave which is less than the sum of the individual waves, so the propagating wave exerts a suppressive effect. We use mean-field models based on conductance-based spiking networks to show possible mechanisms for this suppression. We found that the suppressive effect of propagating waves can be explained by two mechanisms, the fact that inhibitory neurons have a higher gain than excitatory neurons, and the fact that these two contributions combine non-linearly with conductances. We speculate on possible roles of such suppressive propagating waves.


The talk is open to the public. Guests are cordially invited!

 


                

BERNSTEIN CENTER FREIBURG
Hansastraße 9a
79104 Freiburg im Breisgau