INS Topical Seminar – Adrien Meguerditchian (LPC, Marseille)

From Thursday 6th April 2017 at 14:00
To Thursday 6th April 2017 at 15:30

Location : New INS Seminar Room, La Timone, Faculty of Medicine, 5th floor, red wing Marseille

 

"On the gestural origins of language: Communication in primates & hemispheric specialization of the brain."

Given the phylogenetical proximity between human and nonhuman primates, research on the communicative, motor and cognitive systems of our primate cousins could help us determining the prerequisites of some language properties inherited from our common ancestor. Whereas some researchers have suggested that language resulted from the evolution of the vocal system, this theory is now challenged by a growing number of authors supporting the “gestural origins” view. Such an alternative theory underlies the fundamental role of gestural communication in the first phylogenetic roots of language.

Such a gestural theory finds support in the considerable evidence of tight links between language organization in humans and gestures including co-speech gestures, sign language in deaf people, and preverbal pointing gestures in infants. Moreover, research has reported potential continuities between the communicative gestural system in nonhuman primates, its lateralization and several fundamental properties of language, such as intentionality, learning flexibility, referential properties and left-hemispheric specialization of the brain. In the present communication, I will review our previous and on-going works on the gestural and vocal behaviors in nonhuman primates, laterality as well as recent findings in anatomical brain imaging in chimpanzees and baboons. I will try to demonstrate that these data in ethology, comparative psychology and neurosciences speak not only for a specific significance of communicative gestures in the course of the language evolution and its hemispheric brain specialization but also for the "bimodal" origin of language with the progressive integration of the oro-facial and vocal control into the gestural intentional system.

 

For any question, feel free to contact:
Demian Battaglia (demian.battaglia@univ-amu.fr) or Benjamin Morillon (bnmorillon@gmail.com)

 



INS/Epinext Topical Seminar – Marta Favali (Paris)

From Friday 17th March 2017 at 11:00
To Friday 17th March 2017 at 12:30

Location : New INS Seminar Room, La Timone, Faculty of Medicine, 5th floor (red wing), Marseille

"Formal models of visual perception based on cortical architectures"

I will show the integration of geometric models of visual perception with dimensionality reduction techniques. Starting from the model of association fields introduced by Citti and Sarti [2], which gives a justification of perceptual completion based on the functionality of the primary visual cortex (V1), it is possible to model the cellular connectivity by solving systems of stochastic differential equations as described in [9] and [1], obtaining the probability density that is the probability of connection between simple cells in V1 [1]. Starting from these kernels, the problem of grouping is faced by means of spectral analysis of suitable affinity matrices [2,7]. For the numerical simulations, I have consider particularly Kanizsa figures as clear examples of problems of visual perception [5], and retinal images, to afford problems of grouping during the tracking of blood vessels [4]. Finally I will show a comparison between the results obtained through these models with functional data fMRI, in order to afford the problem of identification and reconstruction of images from fMRI activity [3,6,8].

References
[1] D. Barbieri, G. Citti, G. Cocci, A. Sarti, A cortical-inspired geometry for contour perception., 2013.
[2] G. Citti and A. Sarti, A cortical based model of perceptual completion in the roto-translation space., Journal of Mathematical Imaging and Vision, 24(3):307-326, 2006.
[3] K. N. Kay, T. Naselaris, R. J. Prenger, and J. L. Gallant. Identifying natural images from human brain activity. Nature, 452(7185): 352-355, 2008.
[4] M. Favali, S. Abbasi-Sureshjani, B. H. Romeny, and A. Sarti. Analysis of vessel connectivities in retinal images by cortically inspired spectral clustering. Journal of Mathematical Imaging and Vision, 56(1):158-172, 2016a.
[5] M. Favali, G. Citti, A. Sarti, Local and global gestalt laws: A neurally based spectral approach, Neural Computation, February 2017, Vol. 29, No. 2, Pages: 394-422.
[6] T. Naselaris, R. J. Prenger, K. N Kay, M. Oliver, and J. L. Gallant. Bayesian reconstruction of natural images from human brain activity. Neuron, 63(6):902-915, 2009.
[7] A. Sarti, G. Citti, The constitution of visual perceptual units in the functional architecture of V1, Journal of computational neuroscience, 38(2):285–300, 2015.
[8] B.Thirion, E. Duchesnay, E. Hubbard, J. Dubois, J. Poline, D. Lebihan, and S. Dehaene. Inverse retinotopy: inferring the visual content of images from brain activation patterns. Neuroimage, 33(4):1104-1116, 2006.
[9] L.R. Williams, D.W. Jacobs, Stochastic completion fields., ICCV Proceedings, 1995.

For any question, feel free to contact:
Demian Battaglia (demian.battaglia@univ-amu.fr) or Benjamin Morillon (bnmorillon@gmail.com)



INS Keynote Seminar – Sylvain Baillet (Montreal)

From Thursday 2nd March 2017 at 14:00
To Thursday 2nd March 2017 at 15:30

Location : New INS Seminar Room, La Timone, Faculty of Medicine, 5th floor (red wing), Marseille

"Possible mechanisms underlying the polyrhythmic activity of the brain: from rest to perception."

One broad objective in neuroscience is to comprehend the mechanisms of large-scale, oscillatory neural dynamics: how they enable functions by shaping communication in brain networks, and how the earliest detection of their alterations in disease can contribute to improved healthcare prevention and interventions. To contribute toward this goal, our approach is to combine imaging methods and experimental neuroscience with computational and disease models, neuromodulation techniques, and translational arms to the clinic and industry. Our rationale is that the ubiquitous polyrhythmic activity of the brain has been approached empirically, with underlying mechanisms that remain not understood.
This hinders our comprehension of how 1) perception and behaviour emerge from brain network activity, and 2) the pathophysiological developments of brain and mental-health disorders increasingly studied as network diseases, affect large-scale neural communication.

These difficult questions require a bottom-up approach: We aim to understand how basic physiological factors of neural integrity and function shape the dynamical structure of oscillatory brain rhythms, such as their interdependence across multiple frequencies through cross-frequency coupling. These phenomena represent a deep source of uncharted markers of neural excitability, activity and connectivity. I will illustrate these principles with our latest results concerning the resting brain, multimodal perception and pathophysiological markers of epilepsy and neurodegenerative syndromes.

For any question, feel free to contact:
Demian Battaglia (demian.battaglia@univ-amu.fr) or Benjamin Morillon (bnmorillon@gmail.com)



INS Keynote Seminar – Valentin Wyart (Paris)

From Thursday 23rd February 2017 at 14:00
To Thursday 23rd February 2017 at 15:30

Location : New INS Seminar Room, La Timone, Faculty of Medicine, 5th floor (red wing), Marseille

"Premature, self-confirmatory commitment to uncertain decisions during pharmacologically induced transition to psychosis: a placebo-controlled, double-blind EEG study in healthy human subjects"

In schizophrenia, early stages of psychosis are characterized by a state of pathological uncertainty (or 'strangeness') which is difficult to study in patients due to its transitional nature. Therefore, the alterations of mental processes which lead to full-blown delusions remain largely unknown. Here we studied a pharmacological model of this condition using ketamine, an NMDA receptor antagonist, in healthy subjects performing a decision-making task based on ambiguous probabilistic cues.
Computational modeling of subjects' behavior under ketamine revealed a decrease in the precision of inference - the mental process of interpreting and accumulating evidence during decision-making. The analysis of simultaneously recorded EEG signals provided support for this selective alteration, by showing a degraded neural coding of the evidence provided by individual cues. Furthermore, upcoming decisions could be decoded earlier from EEG signals under ketamine, and evidence inconsistent with upcoming decisions were down-weighted in the inference process.
Together, these findings indicate a premature, self-confirmatory commitment to uncertain decisions under ketamine, a selective alteration of decision-making which could explain the stabilization of aberrant beliefs characteristic of psychosis.

For any question, feel free to contact:
Demian Battaglia (demian.battaglia@univ-amu.fr) or Benjamin Morillon (bnmorillon@gmail.com)



Matinée d’INFORMATION & d’ECHANGES sur l’EPILEPSIE

From Saturday 4th February 2017 at 09:00
To Saturday 4th February 2017 at 12:00

Location : Hôpital de la Timone - Amphithéâtre HA1 264 Rue Saint Pierre Marseille

Le service de Neurophysiologie Clinique dirigé par le Prof. Fabrice Bartolomei organise une matinée d'information et d’échanges sur l’épilepsie prévue le 04/02/2017 à l'Amphi HA1 de l'Hôpital Timone. L’organisation de cette réunion compte avec le soutien d’Epilepsie France (www.epilepsie-france.com) et de la FHU Epinext (www.epinext.org) et est sponsorisé par le laboratoire UCB.

Il s'agit d'une réunion grand public dédiée surtout aux patients et leurs familles où on présentera les réseaux de soins en épileptologie, c’est qu’une crise d’épilepsie, quels sont les progrès qui ont été fait en génétique, comment on développe un médicament antiépileptique et une discussion autour des conflits d’intérêts. Cette matinée est ouverte aussi au personnel du corps médical ou des chercheurs qui pourraient être intéressés par l’épilepsie.

Vous trouverez ci-dessous le programme et le plan d’accès à la Faculté de Médecine Timone.

PROGRAMME

ITINÉRAIRE

L’inscription est gratuite mais obligatoire jusqu’au 31/01/2017 sur ce site :  https://fr.surveymonkey.com/r/9VTWRG2



INS Keynote Seminar – Maria SANCHEZ-VIVES (Barcelona)

From Thursday 2nd February 2017 at 14:00
To Thursday 2nd February 2017 at 16:00

Location : New INS Seminar Room, La Timone, Faculty of Medicine, 5th floor, red wing Marseille

Désolé, cet article est seulement disponible en English.



INS Keynote Seminar – Bruno CAULI (UPMC, Paris)

From Thursday 12th January 2017 at 14:00
To Thursday 12th January 2017 at 15:30

Location : New INS seminar room, La Timone, Faculty of medecine, 5th floor (red wing), Marseille



INS Keynote Seminar – Francesca SARGOLINI (Marseille)

From Thursday 1st December 2016 at 14:00
To Thursday 1st December 2016 at 16:00

Location : New INS seminar room, La Timone, Faculty of medecine, 5th floor (red wing), Marseille

Désolé, cet article est seulement disponible en English.



« Musique, Language et surdité »

From Friday 25th November 2016 at 9:30
To Friday 25th November 2016 at 17:00

Location : Campus La Timone Lieux multiples à préciser Marseille

Désolé, cet article est seulement disponible en English.



INS Keynote Seminar – Sylvie NOZARADAN (Sidney)

From Thursday 13th October 2016 at 14:00
To Thursday 13th October 2016 at 15:30

Location : INS seminar room, La Timone, Faculty of medecine, 5th floor (red wing), Marseille

Désolé, cet article est seulement disponible en English.



SFR « Cerveau et Cognition » conference – Giulio TONONI (Madison, Wisconsin)

From Friday 8th July 2016 at 10:30
To Friday 8th July 2016 at 18:00

Location : Salle de Conférence Maurice Toga, La Timone, Faculty of medecine, Entrance hall, on the left side (1st floor), Marseille

Désolé, cet article est seulement disponible en English.



INS Topical Seminar – Eyal BERGMANN (Technion, Haifa)

From Thursday 30th June 2016 at 14:00
To Thursday 30th June 2016 at 16:00

Location : New INS seminar room, La Timone, Faculty of medecine, 5th floor (red wing), Marseille

Désolé, cet article est seulement disponible en English.



Joint INS/INT Keynote seminar – Charles GRAY (Bozeman, MT)

From Friday 17th June 2016 at 14:30
To Friday 17th June 2016 at 15:30

Location : salle gastaut at INT, La Timone, INT building, ground floor, Marseille

Désolé, cet article est seulement disponible en English.



INS Keynote Seminar – Benjamin MORILLON (INS, Marseille)

From Thursday 19th May 2016 at 14:00
To Thursday 19th May 2016 at 15:30

Location : New INS seminar room, La Timone, Faculty of medecine, 5th floor (red wing), Marseille

Désolé, cet article est seulement disponible en English.



INS Topical Seminar – May BROOKS-KAYAL (University of Colorado)

From Tuesday 17th May 2016 at 11:00
To Tuesday 17th May 2016 at 12:30

Location : New INS seminar room, La Timone, Faculty of medecine, 5th floor (red wing), Marseille

Désolé, cet article est seulement disponible en English.



INS Topical Mini-seminars – Peter VAN MIERLO and Ana COITO (Geneva)

From Thursday 12th May 2016 at 14:00
To Thursday 12th May 2016 at 16:00

Location : New INS seminar room, La Timone, Faculty of medecine, 5th floor (red wing), Marseille

Désolé, cet article est seulement disponible en English.



INS Keynote seminar – Pau GOROSTIZA (Barcelona)

From Thursday 28th April 2016 at 14:00
To Thursday 28th April 2016 at 15:30

Location : New INS seminar room, La Timone, Faculty of medecine, 5th floor (red wing), Marseille

Désolé, cet article est seulement disponible en English.



INS Keynote seminar – Antoni VALERO CABRE (ICM, Paris)

From Thursday 21st April 2016 at 14:00
To Thursday 21st April 2016 at 15:30

Location : New INS seminar room, La Timone, Faculty of medecine, 5th floor (red wing), Marseille

Désolé, cet article est seulement disponible en English.



INS Keynote seminar – Gustavo DECO (UPF, Barcelona)

From Friday 11th March 2016 at 14:00
To Friday 11th March 2016 at 16:00

Location : New INS seminar room, La Timone, Faculty of medecine, 5th floor (red wing), Marseille

Désolé, cet article est seulement disponible en English.



INS topical seminar – Matteo DI VOLO (GNT-ENS, Paris)

From Wednesday 9th March 2016 at 14:30
To Wednesday 9th March 2016 at 16:00

Location : New INS seminar room, La Timone, Faculty of medecine, 5th floor (red wing), Marseille

Désolé, cet article est seulement disponible en English.