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Modulation des activations cérébrales par des odeurs subliminales : une étude en IRM fonctionnelle

Abstract : Some studies showed that subliminal odours – odours of very low intensity which activate the olfactory system but are not consciously perceived – can impact food behaviours. However, the sensory and cognitive mechanisms involved in subliminal odours processing remain poorly known. This work aims exploring cerebral activity induced by subliminal odours by the means of functional Magnetic Resonance Imaging. During MRI acquisitions, participants were unknowingly exposed to two odours presented at subliminal intensity and then at supraliminal intensity. Four cerebral networks highlighted by Independent Component Analysis (ICA) prove to be specific to the subliminal condition. These networks are not particular to olfactory processing and seem to be linked to attentional and executive control processes. The modulation of their activity by subliminal odours brings new elements to understand the impact of these odours on behaviour, and suggests possible applications for using these odours to regulate food behaviour.
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Submitted on : Tuesday, December 3, 2019 - 11:50:10 AM
Last modification on : Wednesday, December 4, 2019 - 1:38:39 AM
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  • HAL Id : tel-02390763, version 1


Coralie Mignot. Modulation des activations cérébrales par des odeurs subliminales : une étude en IRM fonctionnelle. Neurosciences [q-bio.NC]. Université de Strasbourg, 2019. Français. ⟨NNT : 2019STRAJ023⟩. ⟨tel-02390763⟩



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