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Studying the neurophysiology of active vision: novel approaches from eye-movements and intracerebral-EEG| old_uid | 10131 |
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| title | Studying the neurophysiology of active vision: novel approaches from eye-movements and intracerebral-EEG |
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| start_date | 2011/09/02 |
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| schedule | 11h-12h |
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| online | no |
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| summary | In order to have a visual representation of the environment, we explore our surroundings with our gaze. We do this by moving our eyes two or three times each second and directing them to the most important elements in a given scene. The probability of looking any element is given by its saliency and its relevance to current behavioral goals. Indeed, cognitive processes, such as learning, working
memory and specially attention are thus highly involved in guiding eye-movements and visual perception.
Here I will present non-invasive and invasive electrophysiological evidence that in order to approach to a more complete model of vision, perception needs to be understood as an active process which is constantly interacting with other ongoing cognitive operations.
I will briefly introduce the subject by showing evidence that perception and attention are learning dependent and that this phenomenon can be assessed in several scalp-ERP waves and oscillations.Then I will show how we can use intracerebral high-gamma activity (50-150 Hz) as a marker for
neural processing with an study on visuospatial working memory and visual imagery. After that, I want to show how we can combine intracerebral high-gamma activity with eye-movement measures rendering the highest spatiotemporal resolution for studying human brain dynamics during freeviewing.
To conclude, I propose to use this novel combination of intracerebral-EEG and eyetracking,to develop a promising research line on the neurophysiological dynamics of active vision and psycho-linguistic processing during attentive reading. |
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| responsibles | Pélissier |
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