Troubles du langage verbal et non-verbal dans la maladie d'Alzheimer : Effets d'ateliers en voix chantée.

Abstract : Despite the multimodal character of language, few researches studied the verbal and non-verbal communication abilities of people with Alzheimer’s disease, and even less of remediation via singing voice of those disorders. However their remediation could help to slowing down the symptomatic progression of language disorders. Given life expectancy, the exponential prevalence of neurocognitive disorders from 65 years old – of which most frequent cause is Alzheimer’s disease for which no curative treatment exists at this time –, the identification of factors slowing the symptoms progression is of the utmost importance. In view of those elements, this research focuses on the impact of singing on verbal and non-verbal communication disorders in Alzheimer’s disease. To do so, an original protocol has been set up consisting in a repetition task in singing or in speech, with or without the presentation of communicative manual gestures. This protocol helped evaluating multimodal communication abilities of people with Alzheimer’s disease and with ‘normal’ ageing. At the pre-tests, many verbal and non-verbal language disorders have been found. From the mild stage of the disease, the participants of the Patient group have produced more linguistic errors (of different types) and pauses and/or vocalic lengthenings than Control group participants. The manual gestures repetition ability of the participants of the Patient group also seems impacted, as the quality of iconic gestures production. From the moderate stage of the disease, the participants of the Patient group have produced more linguistic errors and on different types of linguistic unities, as well as more spontaneous co-verbal gestures than Control group participants. From the severe stage of the disease, the participants of the Patient group have repeated less utterances and produced more pauses and/or vocalic lengthenings than Control group participants. An impact of singing voice has only been noted on the utterances’ repetition rate, less high in singing and speech for all participants, which could be cause by a double task effect. The comparative results of verbal and non-verbal linguistic abilities have showed a positive impact of workshops in singing on the production of linguistic errors and the communicative gestures repetition of the participants of the Patient group. Our results have been discussed in the light of literature in order to distinguish verbal and non-verbal language disorders linked to ‘normal’ ageing and those symptomatic of Alzheimer’s disease. These findings enable us to make progress and to bring contribution in the current debate on the diverse possible origins of language in its multimodality, as well as suggest a line of research of the impact of singing voice on language disorders of people with Alzheimer’s disease.
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Diane Caussade. Troubles du langage verbal et non-verbal dans la maladie d'Alzheimer : Effets d'ateliers en voix chantée.. Médecine humaine et pathologie. Université Grenoble Alpes, 2017. Français. ⟨NNT : 2017GREAL019⟩. ⟨tel-01813396⟩

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