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Theses

Investigation électrophysiologique par la stimulation visuelle périodique rapide des mécanismes de discrimination des expressions faciales émotionnelles

Abstract : This thesis focuses on the study of the cognitive and neural mechanisms involved in emotional expressions discrimination through fast periodic visual stimulation (FPVS) combined with electroencephalographic recording (EEG). More specifically, three main questions are asked: Is there an influence of an emotional context (complex visual scenes with positive or negative content) on emotional face processing? (Study 1); What are the mechanisms involved in the detection of dynamic and brief emotional expression changes when faces are embedded in natural surroundings? (Study 2); What are the neural basis underlying dynamic and brief emotional changes measured with intracerebral electrophysiological recordings (stereo-electroencephalography - SEEG)? (Study 3). The research findings highlight 1) a fast integration of emotional facial expressions and complex visual scenes over occipito-temporal cortex; 2) the human brain capacity to detect dynamic and brief emotional expression changes despite the high variability of the stimuli (viewpoint, age, ethnic group and surrounding context); 3) the role and differential implication of two key brain regions in the perception of emotional changes: the amygdala and the fusiform gyrus. These main results are discussed in the light of the literature. The conclusion leads to future research perspectives.
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https://hal.univ-lorraine.fr/tel-03341121
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Submitted on : Friday, September 10, 2021 - 3:00:49 PM
Last modification on : Saturday, September 11, 2021 - 3:33:28 AM

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  • HAL Id : tel-03341121, version 1

Citation

Stéphanie Matt. Investigation électrophysiologique par la stimulation visuelle périodique rapide des mécanismes de discrimination des expressions faciales émotionnelles. Psychologie. Université de Lorraine, 2020. Français. ⟨NNT : 2020LORR0246⟩. ⟨tel-03341121⟩

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