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Intention versus preparation motrice dans l’orientation de l’attention visuo-spatiale. Movement intention versus motor preparation in the orientation of attention.| old_uid | 4078 |
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| title | Intention versus preparation motrice dans l’orientation de l’attention visuo-spatiale. Movement intention versus motor preparation in the orientation of attention. |
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| start_date | 2008/02/14 |
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| schedule | 15h |
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| online | no |
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| location_info | salle de réunion de l’U864 |
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| details | Journal Club de l’U864 |
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| summary | Previous research has shown that the preparation of both eye and hand movements orients visuo-spatial attention towards the position aimed for by that movement. However, the definition of the “aimed-for” position is currently under debate: movement preparation could orient attention toward the goal of the movement (i.e. the position defined by movement intention) or towards the position defined by the motor coordinates of the movement itself. In the oculomotor system, these two positions can be dissociated by saccadic adaptation, but this methodology has led to divergent results, with some studies suggesting that attention is oriented towards the saccade target position (Deubel, ECEM 2007) and others to the saccade endpoint position (Doré-Mazars & Collins, 2005). After a discussion of the divergent results and methodology used in these two studies, an experiment addressing the role of the movement target versus endpoint in attentional orienting with hand movements will be presented. In this experiment, the goal of the movement and the movement endpoint were dissociated by tool use. Subjects had to point towards a visual target with the tip of a hand-held tool. The movement goal corresponded to the position aimed for with the tip of the tool, and the motor coordinates corresponded to the position towards which the hand moved to place the tool correctly on the visual target. Visual discrimination performance was tested at both positions with a feature discrimination task. Results suggest that visuo-spatial attention is oriented towards both the movement goal and the movement endpoint. Such results argue that both the movement goal and the movement endpoint play a role in attentional orienting. |
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| oncancel | changement de salle, horaire inhabituel |
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| responsibles | Farnè, Béranger, Soulier |
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