26 novembre 2019: 1 événement


  • Séminaires LPNC

    Mardi 26 novembre 13:00-14:00 - Stephen Ramanoël - InsSorbonne Universités, INSERM, CNRS, Institut de la Vision

    The neural correlates of visuo-spatial information processing in healthy aging

    Résumé : The 21st century is marked by a demographic “graying” of the global population. In this context, spatial navigation as a complex behavior encompassing perceptual and cognitive processes, provides an ideal framework for the study of normal and pathological aging. Older adults exhibit prominent impairments in their capacity to navigate efficiently, reorient in unfamiliar environments or update their path when faced with obstacles. This decline in navigational capabilities has traditionally been ascribed to memory impairments and dysexecutive function whereas the impact of visual aging has often been overlooked. The ability to perceive visuo-spatial information such as the overall layout of an environment or the salient landmarks it contains is essential to navigate in space efficiently. To date, the functional and neurobiological factors responsible for the deterioration of visuo-spatial functions in the elderly remain insufficiently characterized. To address this issue, we implemented a highly interdisciplinary approach, bringing together clinical, psychophysical and behavioral assessments as well as neuroimaging paradigms combining morphometric measurements, connectivity analyses, functional magnetic resonance imaging (fMRI) and virtual reality. This work helps towards a better comprehension of the neural dynamics subtending visual-cue based navigation and it provides new insights on the impact of age-related visuo-spatial processing changes on navigation capabilities.

    Lieu : Bâtiment Michel Dubois (ex. BSHM), salle A006

    En savoir plus : Séminaires LPNC