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Predictive Position Coding

Objective

Vision gives us enormous adaptive advantage because it allows us to see and react to events before they reach us. This predictive advantage is most obvious for an object in motion where the current trajectory predicts future location. It is equally important when the object’s motion results from the movement of our own eyes. Here our visual system uses knowledge about the upcoming motion of the eyes to predict the future location of the object. In this proposal, we will analyze both instances as two sides of a common predictive process that operates on the maps that control eye movements and spatial attention. We propose that this predictive positioning is involved not only in the guidance of eye movements and the deployment of attention to expected target locations but also for the location at which the target is perceived, including when a target is seen at a predicted location even though it is never there. This framework of a “master map” of target locations for perception as well as overt and covert orienting is a radical departure from the standard “labeled-line” model in which active neurons throughout the visual system specify the position of a target by virtue of their receptive field locations. The predictive shifts of location for moving stimuli and moving eyes, often deviating far from the retinal input, provide a powerful means for evaluating this proposal on many fronts. We will test these predictions with behavioral, fMRI and TMS techniques in healthy and neurological patients, and neurophysiological techniques in non-human primates. According to our working hypothesis, predictive position coding is a core function of the eye movement control system and its companion spatial attention system. The results of the proposed experiments will have the potential to show that it is the properties of action that determine the perception of position, reversing the common assumption that perception guides action.

Call for proposal

ERC-2012-ADG_20120411
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Host institution

UNIVERSITE PARIS DESCARTES
Address
Rue De L Ecole De Medecine 12
75270 Paris Cedex 06
France
Activity type
Higher or Secondary Education Establishments
EU contribution
€ 1 768 365,32
Principal investigator
Patrick Cavanagh (Dr.)
Administrative Contact
Lucie Guilloteau (Mrs.)

Beneficiaries (2)

UNIVERSITE PARIS DESCARTES
France
EU contribution
€ 1 768 365,32
Address
Rue De L Ecole De Medecine 12
75270 Paris Cedex 06
Activity type
Higher or Secondary Education Establishments
Principal investigator
Patrick Cavanagh (Dr.)
Administrative Contact
Lucie Guilloteau (Mrs.)
INSTITUT NATIONAL DE LA SANTE ET DE LA RECHERCHE MEDICALE
France
EU contribution
€ 219 794,68
Address
Rue De Tolbiac 101
75654 Paris
Activity type
Research Organisations
Administrative Contact
Isabelle Verdier (Mrs.)