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Relations sensori-motrices lors de communication parlée : Application chez les jeunes adultes et séniors normo-entendants et les patients sourds implantés cochléaire

Abstract : Speech communication can be considered as an interactive process involving afunctional coupling between sensory and motor systems. The aim of this thesis was to test possible perceptuo-motor linkages during both speech perception and production, using distinct behavioral paradigms and populations. The experimental protocol was made of three classic experiments: a first paradigm of close-shadowing, aiming at exploring the partially motor format of audio and audiovisual stimuli; a second paradigm allowing to correlate production and perception of vowels; and a third paradigm of conscious and unconscious imitation of pitch. The experimental protocol was validated with a first group of young hearing adults. The second population studied was composed of elderly normal-hearing participants, in order to evaluate the consequences of both cognitive and linguistic declines. Results allowed us to suggest a functional activation of perceptuo-motor linkage during speech production and perception.The third population we tested comprised post-lingually deaf patients wearing acochlear implant. Our objective was to determine the impact of the sensorial deprivation and the re-learning processes, associated with their implantation, on perceptuo-motor linkages. Unexpectedly, results showed an active sensori-motor relationship in those participants, even shortly after the cochlear implantation. Altogether, our results confirmed the perceptuo-motor nature of speech. Importantly, in spite of degraded performances, these interactions between the sensory and the motor systems during speech production and perception remained functional in both the elderly normal-hearing population and the post-lingually deaf patients, wearing a cochlear implant.
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Lucie Scarbel. Relations sensori-motrices lors de communication parlée : Application chez les jeunes adultes et séniors normo-entendants et les patients sourds implantés cochléaire. Linguistique. Université Grenoble Alpes, 2016. Français. ⟨NNT : 2016GREAS007⟩. ⟨tel-01312203⟩

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