Representations in rate and synchrony Stopfer M, Bhagavan S, Smith - PowerPoint PPT Presentation

Representations in rate and synchrony Stopfer M, Bhagavan S, Smith BH, and Laurent G. Impaired odour discrimination on desynchronization of odour-encoding neural assemblies. Nature 390: 70-74, 1997 Laurent, G. Dynamical representation of odors by oscillating and evolving neural assemblies. Trends Neurosci. 1996 Nov;19(11):489-96. Review.

http://www.springerimages.com/Images/LifeSciences/1-10.1007_s00049-009-0033-7-1

http://www.sciencedirect.com/science/article/pii/S0166223698012363

http://cognition.ups-tlse.fr/pami/pamiEn.html

Correlation between activity patterns 1.0 0.8 0.6 Spatial 0.4 or 0.2 Rate 0.0 code Octanol - Hexanol - Hexanol - Nonanol Octanol Nonanol Sachse, Rappert, & Galizia, European Journal of Neuroscience 11 (11), 3970-3982.

Percentage of bees responding to a test stimulus after conditioning is a measure of generalization between odorants. C onditioned D issimilar S imilar C S D

Correlation between activity patterns Behavioral generalization 1.0 0.8 0.6 0.4 0.2 0.0 Octanol - Hexanol - Hexanol - Nonanol Octanol Nonanol Sachse, Rappert, & Galizia, European Journal of Neuroscience 11 (11), 3970-3982.

Behavioral generalization Correlation between activity patterns 0.0 0.2 0.4 0.6 0.8 1.0 Octanol - Nonanol Hexanol - Octanol Hexanol - Nonanol

Synchronization or Temporal code

Laurent G et al. J. Neurosci. 1996;16:3837-3847

Odor ( CS ) activates SNs Projection Neuron (PN) Local Interneuron (LN) Inhibitory synapse PN PN Associative Neuron (AN) 2 8 2 6 9 2 4 7 2 2 5 2 0 3 1 8 1 6 1 1 4 - 1 1 2 - 3 1 0 - 5 Sucrose ( US ) activates AN Cleland and Linster, Behav Neurosci. 2002 Apr;116(2):212-21.

Computational Model of the Antennal Lobe - Odor induced oscillations Weak input 9 7 5 3 1 - 1 - 3 - 5 Strong input 2 8 2 8 2 6 2 6 2 4 2 4 2 2 2 2 2 0 2 0 1 8 1 8 1 6 1 6 1 4 1 4 1 2 1 2 1 0 1 0 from: Stopfer et al., Nature 390, 1997. see also: Wehr and Laurent, Nature 384, 1996; MacLeod and Laurent, Science 274 , 1996.

S imilar D issimilar C onditioned 1 1 0 1 2 0 1 3 0 1 4 0 1 5 0 1 6 0 1 7 0 1 8 0 1 250 ms

C onditioned S imilar D issimilar D S C 1 1 0 1 2 0 1 3 0 1 4 0 1 5 0 1 6 0 1 7 0 1 8 0 1 250 ms

Percentage of bees responding to a test stimulus after conditioning is a measure of generalization between odorants. C onditioned D issimilar S imilar C S D

If inhibition is blocked, oscillations and synchrony disappear 2 8 2 8 2 6 2 6 2 4 9 2 4 2 2 7 2 2 2 0 5 2 0 1 8 3 1 8 1 6 1 6 1 1 4 1 4 - 1 1 2 1 2 - 3 1 0 1 0 - 5

In the model, odor-evoked oscillations and accompanying synchrony among AL neurons are concentration-dependent. No inhibition Inhibition 0 1 0 0 2 0 0 3 0 0 4 0 0 5 0 0 6 0 0 7 0 0 0 1 0 0 2 0 0 3 0 0 4 0 0 5 0 0 6 0 0 7 0 0 500 ms This has been shown experimentally in the locust and honeybee antennal lobe

C onditioned S imilar D issimilar 1 1 0 1 2 0 1 3 0 1 4 0 1 5 0 1 6 0 1 7 0 1 8 0 1 C S D 250 ms

Representations in rate and synchrony Stopfer M, Bhagavan S, Smith - PowerPoint PPT Presentation

Representations in rate and synchrony Stopfer M, Bhagavan S, Smith BH, and Laurent G. Impaired odour discrimination on desynchronization of odour-encoding neural assemblies. Nature 390: 70-74, 1997 Laurent, G. Dynamical representation of odors by

1 Chances to weaken ordering Virtual Synchrony at a glance Suppose that any conflicting

Rate vs temporal code about synchrony Learning objectives: Learning objectives: To

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Labor Classification Yrs Rate 1 Rate 2 Rate 3 Rate 4 Rate 5 Rate 6 Rate 7 Rate 8 Rate 9

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Phase dynamics 2 1 Spike trains, firing rates, and synchrony 1. Decorrelated firing 2.

On SAT representations of XOR constraints (towards a theory of good SAT representations) Matthew

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Localized failures: synchrony Nicola Santaro: Design and Analysis of Distributed Algorithms

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Representations in rate and synchrony Stopfer M, Bhagavan S, Smith - PowerPoint PPT Presentation

Representations in rate and synchrony Stopfer M, Bhagavan S, Smith BH, and Laurent G. Impaired odour discrimination on desynchronization of odour-encoding neural assemblies. Nature 390: 70-74, 1997 Laurent, G. Dynamical representation of odors by

1 Chances to weaken ordering Virtual Synchrony at a glance Suppose that any conflicting

Rate vs temporal code about synchrony Learning objectives: Learning objectives: To

Back to Basics: Homogeneous Representations of Multi-Rate Synchronous Dataflow Graphs Robert de

Taking Synchrony Seriously: Taking Synchrony Seriously: A Perceptual-Level Model of Infant A

Labor Classification Yrs Rate 1 Rate 2 Rate 3 Rate 4 Rate 5 Rate 6 Rate 7 Rate 8 Rate 9

Byzantine Fault Tolerance and Partial Synchrony Stefan Stattelmann Seminar Advanced Topics in

Consensus with Partial Synchrony Pedro Ferreira do Souto Departamento de Engenharia Informtica

On SAT representations of XOR constraints (towards a theory of good SAT representations) Oliver

The Synchrony Hypothesis or The Importance of Being Constructive inspired by Tom Shiple, Grard

Phase dynamics 2 1 Spike trains, firing rates, and synchrony 1. Decorrelated firing 2.

On SAT representations of XOR constraints (towards a theory of good SAT representations) Matthew

Visual Representations of Newspaper Information 2 | 25 | Visual Representations of

Localized failures: synchrony Nicola Santaro: Design and Analysis of Distributed Algorithms

Equations, Synchrony, Time, and Collaborative with: Modes Adam Cataldo Patricia Derler

Semantic Games for Synchrony M. Mendler &amp; J. Aguado Informatics Theory Group University of

61A Lecture 16 Announcements String Representations String Representations 4 String

Inside Out: Two Jointly Predictive Models for Word Representations and Phrase Representations Fei

synERJY An Object-oriented Synchronous Programming Language Synchrony - Ten Years After Reinhard

Partial vs. Total Order a.k.a Polychrony vs. Synchrony Models of Time for Safety Critical Systems

Chapter 4 Foundations And Representations I K w &lt; 4

Circumventing Impossibility Partial Synchrony Circumventing Impossibility Consensus is an

6. Image databases Image representations: Digitized (sampled) representation of field-based

Inside Virtual Synchrony Prepared by: Steven Dake 7/12/05 Definitions Group Messaging

Negotiating Commercial Loan Covenants, Representations and Warranties Representations and

Semantic Games for Synchrony M. Mendler & J. Aguado Informatics Theory Group University of

Chapter 4 Foundations And Representations I K w < 4