Uni-Logo
You are here: Home Talks & Events Bernstein Seminar 2014 Ido Kanter (Gonda Multidisciplinary Brain Research Center, Bar-Ilan University, Israel)

Ido Kanter (Gonda Multidisciplinary Brain Research Center, Bar-Ilan University, Israel)

— filed under:

"Reliability and precision of brain functionalities: Ultrafast neuronal plasticity and chaotic dynamics" / Tuesday, July 8, 2014, 17:15 h

What
  • Bernstein Seminar
When Jul 08, 2014
from 05:15 PM to 06:45 PM
Where Lecture Hall, Hansastr. 9a
Add event to calendar vCal
iCal

 

 

 

 

 

 

 

 

 

The Bernstein Center Freiburg



Bernstein Seminar
imagesem2.jpg
Ido Kanter
Gonda Multidisciplinary Brain Research Center
Bar-Ilan University, Israel
 
Reliability and precision of brain functionalities: Ultrafast neuronal plasticity and chaotic dynamics

Tuesday, July 8, 2014

17:15 h

Lecture Hall (ground floor)
Bernstein Center Freiburg
Hansastraße 9A
79104 Freiburg

Abstract:
Consistency and predictability of brain functionalities depend on reproducible activity of a single neuron. We examined the neuronal response latency, the time-gap between stimulation and evoked spike, of a neuron embedded within a large-scale network of cortical cells in vitro, but functionally separated from the network by synaptic blockers. We identified a reproducible non-chaotic neuronal phase where deviations between concave response latency profiles of a single neuron do not increase with the number of stimulations. A chaotic neuronal phase emerges at a transition to convex latency profiles which diverge exponentially, indicating irreproducible response timings. These results put a bound on the neuronal temporal resolution which can be enhanced below a millisecond using neuronal chains. In addition, we experimentally show that the neuron functions as a precise time-integrator, where the accumulated changes in neuronal response latencies, under complex and random stimulation patterns, are solely a function of a global quantity, the average time-lag between stimulations. In contrast, momentary leaps in the neuronal response latency follow trends of consecutive stimulations, indicating ultra-fast neuronal plasticity. On a circuit level, this plasticity implements error-correction mechanisms and fast detectors for misplaced stimulations.

The talk is open to the public. Guests are cordially invited!
www.bcf.uni-freiburg.de
               
Personal tools