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4 juillet 2017
- doi: 10.4000/books.editionsmsh.7150
- isbn: 9782735110872
- eisbn: 9782735118625
https://www.openedition.org/12554 , info:eu-repo/semantics/openAccess
Mots-clés
perception spatiale son mouvement langage travail jeux Humanities, Multidisciplinary SCI098000 TTDCiter ce document
Dorine Vergilino-Perez et al., « Chapitre 5. Le codage de l’espace et des objets par la saccade oculaire », Éditions de la Maison des sciences de l’homme, ID : 10.4000/books.editionsmsh.7150
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Résumé
During visual exploration, the information about an object’s location must be transformed into motor commands through a series of operations known as sensorimotor transformations. In this chapter, we present a series of experiments that examines the frame of reference used for the preparation of double saccade sequences directed at one or two objects. We demonstrate that the action to be peformed on the object effects the coding of the second saccade. A second saccade directed at a new object is coded in a head-centred reference frame to aim for a target position on it and is adjusted to the landing position of the first saccade, whereas a second saccade within the same object is coded in an oculocentric reference frame as a fixed motor rector applied irrespective of the initial landing position on the object. The data may he included in a model that incorporates specfic eye control systems that depend on the selection of goal objects. Moreover, relative to the selection process, the saccadic plan is maintained either in a spatial memory – i.e. in the form of a target position to be aimed for – or in a motor memory – i. e. in the form of a movement to explore within the object.