PSU Mark
Eberly College of Science Mathematics Department

Meeting Details

For more information about this meeting, contact Carina Curto, Tim Reluga.

Title:Neural relativity principle
Seminar:Theoretical Biology Seminar
Speaker:Alexei Koulakov, Cold Spring Harbor Laboratory
(Host: Itskov)
Sensory systems are facing the problem of computing the stimulus identity that is invariant wrt several features, i.e. the gestalt. In the olfactory system, for example, odorant percepts have to retain their identity despite substantial variations in concentration, timing, and background. We propose a novel strategy for the encoding of intensity-invariant stimulus identity that is based on representing relative rather than absolute values of the stimulus features. We argue that this neural relativity principle is implemented in the olfactory system in the form of primacy code and could be generalized to confer more general invariant properties in other modalities. The particular implementation in the olfactory system requires computing Karush-Kuhn-Tucker dual variables and can be implemented by the novel type of networks that we call dual networks. Our theory yields predictions for the structure of connections between olfactory neurons.

Room Reservation Information

Room Number:MB106
Date:01 / 19 / 2016
Time:01:30pm - 02:20pm