CORTIC_AL_GORITHMS

Cortical algorithms for perceptual grouping

Coordinatore	KONINKLIJKE NEDERLANDSE AKADEMIE VAN WETENSCHAPPEN - KNAW    more Spiacenti, non ci sono informazioni su questo coordinatore. Contattare Fabio per maggiori infomrazioni, grazie.
Nazionalità Coordinatore	Netherlands [NL]
Totale costo	2˙500˙000 €
EC contributo	2˙500˙000 €
Programma	FP7-IDEAS-ERC Specific programme: "Ideas" implementing the Seventh Framework Programme of the European Community for research, technological development and demonstration activities (2007 to 2013)
Code Call	ERC-2013-ADG
Funding Scheme	ERC-AG
Anno di inizio	2014
Periodo (anno-mese-giorno)	2014-05-01   -   2019-04-30

 Partecipanti

#	participant	country	role	EC contrib. [€]
1	KONINKLIJKE NEDERLANDSE AKADEMIE VAN WETENSCHAPPEN - KNAW  Organization address address: KLOVENIERSBURGWAL 29 HET TRIPPENHUIS city: AMSTERDAM postcode: 1011 JV contact info Titolo: Mr. Nome: Rikesh Cognome: Balgobind Email: send email Telefono: +31 20 5666903 Fax: +31 20 5666121	NL (AMSTERDAM)	hostInstitution	2˙500˙000.00
2	KONINKLIJKE NEDERLANDSE AKADEMIE VAN WETENSCHAPPEN - KNAW  Organization address address: KLOVENIERSBURGWAL 29 HET TRIPPENHUIS city: AMSTERDAM postcode: 1011 JV contact info Titolo: Prof. Nome: Pieter Roelf Cognome: Roelfsema Email: send email Telefono: +31 20 5664587 Fax: +31 20 5666121	NL (AMSTERDAM)	hostInstitution	2˙500˙000.00

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 Obiettivo del progetto (Objective)

'Why do we perceive objects? Visual perception starts with localized filters that subdivide the image into fragments that undergo separate analyses. Our visual system has to reconstruct the objects that surround us. It has to bind image fragments of the same object and to segregate them from other objects and the background. The standard view in psychology is that perceptual grouping is achieved by a parallel, pre-attentive process that relies on Gestalt grouping cues. My work has started to challenge this view by demonstrating that the visual cortex also implements a serial, attention-demanding algorithm for perceptual grouping. This grouping process may represent the first serial brain algorithm that can be understood at the psychological, neurophysiological and computational level. The present proposal therefore has the potential to revolutionize our view of visual cognition.

Understanding feature binding would represent a breakthrough in cognitive neuroscience. Different brain areas represent distinct visual features. How is activity in these areas integrated? We propose that perceptual grouping relies on two complementary processes, “base-grouping” and “incremental grouping”. We hypothesize that base-grouping is pre-attentive and relies on feed-forward connections from lower to higher areas that activate neurons and determine their stimulus selectivity. In contrast, we propose that incremental grouping relies on feedback and horizontal connections, which propagate enhanced neuronal activity to highlight all the features that belong to the same perceptual object. The present proposal will determine the role of attention in feature binding, the interactions between brain areas for grouping with fMRI in humans and with electrophysiology in non-human primates to reveal the algorithms for perceptual grouping as they are implemented in our brains.'