Bernstein Seminar
You have a new invitation for the Bernstein Seminar on 27 November 2017!

November 27, 2017

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Institute for Adaptive and Neural Computation

School of Informatics, University of Edinburgh

Monday, 27 November 2017

 

14:15 h

 

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

 

Hosted by Ad Aertsen

Biases in multivariate neural population codes

Throughout the nervous system information is commonly coded in activity distributed over large population of neurons with broad tuning curves. In idealized situations where a single, continuous stimulus is encoded in a homogeneous population code, the value of the encoded stimulus can be read out without bias. Here we find that when multiple stimuli are simultaneously coded in the population, biases in the estimates of the stimuli can emerge. Although the bias can be reduced by competitive coding and disappears in the complete absence of noise, the bias is remarkably persistent at low noise levels. We develop a general framework, based on Gaussian Processes, that allows for an accurate calculation of the bias and reveals that the distribution of estimates is bimodal. The results have strong implications for neural coding and behavioral experiments.

 

Literature

A preprint is available on: (Link)

 

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

 

           UPCOMING TALKS

19-12-2017           Dr. Anna Martius, University of Tübingen

16-01-2018           Prof. Andreas Draguhn, Heidelberg University

31-01-2018           Prof. Matthew Rushworth, University of Oxford, UK

13-02-2018           Prof. Julijana Gjorgjieva, MPI Brain Research

13-03-2018           Prof. Siegrid Löwel, Göttingen University

27-03-2018           Prof. Tomislav Milekovic, University of Geneve


                

BERNSTEIN CENTER FREIBURG
Hansastraße 9a
79104 Freiburg im Breisgau