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Résumé :
Navigating into space and memorising navigated/traversed trajectories is considered as a human' s faculty of capital importance. Many researches have already focused in the contribution of different sensory systems to navigation and their role to spatial memory. Nevertheless, the majority of paradigms applied did not manage to dissociate the different types of sensory information in order to examine separately their contribution to the phenomenon.
In the present study, we are proposing a paradigm of virtual reality which allow us to dissociate different types of sensory information in order to understand their eventual interaction and the mechanisms implicated to a trajectory's memorisation.
The subjects are called to mentally reproduce a navigated and memorised corridor in a virtual environment, where a sensory conflict between visual and idiothetic information is been introduced. Movement co-ordinates into real environment are been registered and analysed.
Our results indicate that subjects are able to adapt successfully to a sensory conflict. Furthermore, they are able to memorise the trajectory in association to the conflict. Nonetheless, results suggest that a trajectory's reproduction cannot be influenced by a sensory conflict non-associated to its navigation and encoding. Moreover, there is an in indication that higher conflict values can evoke the activation of conscious mechanisms during the encoding process, and a new hypothesis is been proposed.
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