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Neuroimaging of Human visual cortex

le 28 avril 2016
de 11h30 à 12h30

Séminaire de Michel Dojat (GIN)


Since its introduction in 1991, functional MRI has been largely applied to the exploration of the human visual system. Indeed, a large part of the cortical brain is devoted to visual information processing; and specific properties and dedicated roles of each visual area facilitate their non invasive delineation and in-depth investigation. However, despite a large body of knowledge accumulated during 25 years, based mainly on fMRI studies, the mechanisms used by the visual brain to construct a colourful and informative representation to efficiently interact with the physical world are largely unknown. In this talk, we will present our recent studies to probe cortical mechanisms involved in surface and color perception using specific models such as watercolor effect and grapheme color synesthesia. Ongoing work on visual information processing impairment due to Parkinson disease will be discussed. Several methodological issues related to these cognitive experiments would be emphasized.

  • Bellot E, Coizet V, Moro E, Knoblauch K, Dojat M. Superior Colliculus Processing of Luminance Contrast in Elderly and Parkinson Patients; 2016; HBM conference, Genova (CH).

  • Hupé JM, Dojat M (2015) A critical review of the neuroimaging literature on synesthesia. Front Hum Neurosci 9: 1-35.

  • Bordier C, Hupe JM, Dojat M (2015) Quantitative evaluation of fMRI retinotopic maps, from V1 to V4, for cognitive experiments. Front Hum Neurosci 9: 277.

  • Gérardin P, Devinck F, Dojat M, Knoblauch K (2014) Contributions of contour frequency, amplitude and luminance to the watercolor effect estimated by conjoint measurement. Journal of Vision, 14(4), pii 9.

  • Hupé J, Bordier C, Dojat M (2012) The Neural Bases of Grapheme-Color Synesthesia Are not Localized in Real Color Sensitive Areas. Cerebral Cortex 22: 1622-1633.


Mise à jour le 22 octobre 2016

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