Selectivity of Neurones in Sensory and Motor Cortices:

Static and Dynamic Properties

An Interdisciplinary Workshop to Celebrate the Scientific Collaboration Between

Laboratoire de Neurophysique et Physiologie du Système Moteur (CNRS-Paris V)

Institute of Neuroinformatics (University of Zurich and ETH)

and Interdisciplinary Center for Neural Computation (Hebrew University, Jerusalem)

July 9 - July 17, 2000

Laboratoire de Neurophysique et Physiologie du Système Moteur,

EP1848, 45 Rue des Saints Pères, 75270 Paris, France.


Organisers: D. Hansel, C. Meunier (Paris), and I. Segev (Jerusalem)


Invited speakers: L. Borg-Graham (CNRS, Gif-sur-Yvette), P. Bressloff (Loughborough University), N. Brunel (ENS, Paris), J. Bullier (CERCO, Toulouse), G.B. Ermentrout (University of Pittsburgh), Y. Frégnac (CNRS, Gif-sur-Yvette), K. Hepp (ETH, Zurich), M-C. Hepp-Reymond (ETH, Zurich), K. Martin (ETH, Zurich), M. Nicolelis (Duke University), J. Simon (University of Maryland), I. Nelken (Hebrew University, Jerusalem), P. Roelfsema (University of Amsterdam), S. Seung (MIT, Cambridge), R. Shapley (New York University), H. Sompolinsky (Hebrew University, Jerusalem), S. Thorpe (CERCO, Toulouse), M. Tsodyks (Weizmann Institute), E. Vaadia, (Hebrew University, Jerusalem), C. van Vreeswijk (University College of London)





Monday July 10


Room 48, at the end of the corridor on your right after entering the university

9:00-9:30 Registration

9:30-9:45 - Welcome by Prof. J.-C. Chottard, Dean, Biological Science and Medecine, Université René Descartes

- Practical information

Cortico-spinal input , selectivity of motor commands and population coding

Session 1. Chairman: D. Zytnicki (Neurophysique et Physiologie, Paris)

9:45-10:30 M-C Hepp-Reymond

Enigmatic aspects of cortical motor commands

10:30-11:15 E. Vaadia

Representation of bilateral movements in the motor cortex

11:15-11:30: Coffee break


Session 2. Chairwoman: L. Jami (Neurophysique et Physiologie, Paris)

11:30-12:15 H. Sompolinsky

Population coding of sensory and motor parameters in cortical networks

12:15-13:00 M. Nicolelis

Motor learning and robot control: new adventure in neuron population coding










Tuesday July 11



Morning (Room 48)

Architecture, excitation, inhibition and feature selectivity

Session 1. Chairman: J. Bullier (CERCO, Toulouse)

9:00-9:45 K. Martin

In the context of inhibition …

9:45-10:30 Y. Frégnac

Fast shunting inhibition and slow "horizontal" propagation: a necessary silent step in visual cortical processing

10:30-11:00 Coffee break


Session 2. Chairman: M. Nicolelis (Duke University)

11:30-12:15 J. Simon

Spectrotemporal processing in primary auditory cortex: simplicity and linearity

12:15-13:00 I. Nelken

Spectrotemporal processing in primary auditory cortex: complexity and non- linearity





Wednesday July 12



Morning (Room 48)

Building models of local cortical circuits: how and why ?

Session 1. Chairman: S. Thorpe (CERCO, Toulouse)

9:00-9:45 C. van Vreeswijk

Understanding the mechanism(s) that lead to irregular activity

9:45-10:30 L. Borg-Graham

Bridging Electrophysiology and Theory of Visual Cortex: Considering the Computational Relevance of Biophysical Details

10:30-11:00 Coffee break


Session 2. Chairman: K. Hepp (ETH, Zurich)

11:30-12:15 G.B. Ermentrout

Simplifying complex neural networks and applications to the rodent whisker barrel

12:15-13:00 P. Bressloff

Geometric hallucinations and the functional architecture of primary visual cortex


Afternoon (Room 48)

Dynamics and attractors in primary visual cortex

Chairman: Y. Frégnac (CNRS, Gif-sur-Yvette)

14:30-15:15 M. Tsodyks

Population dynamics in primary visual cortex

15:15-16:00 R. Shapley

Dynamics of the visual cortex: experiment and theory




Thursday July 13



Morning (Room 48)

Interactions between cortical areas

Session 1. Chairman: E. Vaadia (Hebrew University and ICNC, Jerusalem)

9:00-9:45 S. Thorpe

Ultra-rapid visual categorization and its implications for models of visual processing

9:45-10:30 J. Bullier

Role of feedback connections and timing of information processing in the visual cortex

10:30-11:00: Coffee break


Session 2. Chairman: R. Shapley (New York University)

11:30-12:15 P. Roelfsema

Recurrent processing for the detection of connections between image regions

12:15-13:00 K. Hepp

Feedback interactions between neuronal pointers and maps for attentional processing






Friday July 14 and Saturday July 15



Sunday July 16



Morning (Room 48)

Selectivity and persistent activity

Chairman: G.B. Ermentrout (University of Pittsburgh)

10:00-10:45 N. Brunel

Spatial working memory in a cortical network model

10:45-11:30 S. Seung

What role does synaptic feedback play in persistent neural activity ?

11:30-11:45 Coffee break

11:45-12:30 D. Hansel

Existence and stability of persistent neural activity: the role of recurrent inhibition


Afternoon (Room 48)

14:00-16:00 General discussion



Location of the workshop:

Medical School of Université René Descartes, Room 48

45 Rue des Saints-Pères

sixth arrondissement

Metro: Saint-Germain des Prés (line 4), Mabillon (line 10) and Rue du Bac (line 12)

Bus: 95, 48, 39, 27, 24

The Laboratoire de Neurophysique et Physiologie du Système Moteur is located on the third floor of the Medical School building

Tel: + 33-(0)1 42 86 21 38 (Monique Commercy, secretary)

+ 33-(0)1 42 86 21 41 (Claude Meunier)

+ 33-(0)1 42 86 22 71 (David Hansel)

Fax: + 33-(0)1 49 27 90 62