Vision Group

Leader

Co-Leaders

Research center

45 rue d’Ulm
75230 Paris
Marc Mézard

Institution

Ecole Normale Supérieure
CNRS
ED 3C - 158

Laboratory

Laboratoire des Systèmes Perceptifs
Phone: 01 42 86 43 14
UMR 8248
Institut d’Etude de la Cognition

Mots clefs

Psychophysics
neuroimagery
behavioural psychophysics, integrative neuroscience, and computational modelling
predictive coding, scene analysis, and dynamic sensory processes
 

publications

de Gardelle V, Le Corre F, Mamassian P. Confidence as a Common Currency between Vision and Audition. PLoS One. 2016 Jan 25;11(1):e0147901. doi: 10.1371/journal.pone.0147901. eCollection 2016.

Vienne, C., Blondé, L., and Mamassian, P. (2014). Perception, 43(6), 481-498.

Desantis, A., Mamassian, P., Lisi, M., and Waszak, F. (2014). Experimental Brain Research.

Vienne, C., Sorin, L., Blondé, L., Huynh-Thu, Q., and Mamassian, P. (2014). Vision Research, 100, 124-133.
de Gardelle, V., and Mamassian, P. (2014). Psychological Science, 25(6), 1286-1288.

Narain, D., Mamassian, P., van Beers, R. J., Smeets, J. B., and Brenner, E. (2013). PLoS One, 8(4):e62276. doi:10.1371/journal.pone.0062276.

Simoncini, C., Perrinet, L. U., Montagnini, A., Mamassian*, P. and Masson*, G. S. (2012). Nature Neuroscience, 15, 1596-1603. (*):joint senior author.

Fields of research

Cognitive neurosciences / neuropsychology /neuroeconomy

Research Theme

The vision team of the Laboratoire Psychologie de la Perception has research interests in all aspects of visual perception. Its expertise covers visual attention, visual awareness and perceptual decisions, sensorimotor coupling, 3D perception, and the interaction of vision with the other senses. It relies on experimental methods issued from psychophysics, neuroimagery, patient studies, and modelling. Specific research topics include motion perception, colour modelling, visual attention, three-dimensional perception from multiple cues, cross-modal interactions, eye-movements, perception-action interactions, intention-based vs. reflexive actions, and time perception.

Etudiants ENP

Anna PTUKHA

Lab rotation

Neural bases of three-dimensional objects formation

Chercheur responsable: 

NERI Peter

Dates: 

18 September 2017 - 29 June 2018

Date limite de candidature: 

29 June 2018

Period

~ Sept-Dec 2017

~ Jan-March 2018

~ April-June 2018

Project

Visual three-dimensional space (3D) perception relies on binocular correspondence of image features. In most mammals, this correspondence takes place in the cortex, sub-cortical structures preserving monocular information. Numerous studies have indeed shown the existence of cortical neurons sensitive to binocular disparities. How 3D objects are inferred from these binocular disparities? Is there an influence of the inferred object on the binocular sensitivity of each neuron (Qiu et coll., 2007)? To address these questions, it is proposed to record the dynamics of neuronal responses in the primary visual areas of ferrets. The animal will be beforehand trained to stabilize its gaze on a fixation point and this stabilization will be controlled with an eye-tracker. Extra-cellular recordings of neurons in areas 17 and 18 will help define the receptive fields and the characteristics of these neurons in terms of preferred orientation (Wilson et coll., 2016) and binocular sensitivity. Elementary features (lines) or connected objects (lines connected together to form a 3D object) will then be presented to each of these neurones, and temporal dynamics of neuronal response will be analysed. The project requires basic knowledge in electrophysiology and programming, as well as an interest in visual perception.

References

Qiu, F.T., Sugihara, T., von der Heydt, R. (2007). Figure-ground mechanisms provide structure for selective attention. Nature Neuroscience, 10, 1492-1499. 

Wilson, D.E., Whitney, D.E., Scholl, B., and Fitzpatrick, D. (2016). Orientation selectivity and the functional clustering of synaptic inputs in primary visual cortex. Nature Neuroscience, 19, 1003–1009

Contact

Ecole Normale Supérieure - Laboratoire des Systèmes Perceptifs - 29 rue d’Ulm 75005 Paris - pascal.mamassian@ens.fr

Superviseur: 

MAMASSIAN Pascal & BOUBENEC Yves