Effets d'un amorçage olfactif dans une tache de décision lexicale chez le sujet présentant une maladie d'Alzheimer précoce

Abstract : Olfaction is closely related with memory and emotions, making odours a potentially needful tool for the care of people with Alzheimer's disease. Impaired semantic memory is part of the clinical expressions of Alzheimer's disease. In the early stage of the disease, implicit memory measurements can highlight activation of the semantic memory. In our study, we explored the potential of the semantic memory to be activated by an olfactory stimulus. We verified the presence of semantic priming effect in olfactory modality through the use of a semantic priming paradigm in a lexical decision task. Our results showed heterogeneous effects in both our groups (Alzheimer's disease and controls). The fact that some subjects showed negative priming effects did not allow us to conclude that olfactory primes are successful in triggering semantic activation. Unlike lexical primes, olfactory primes have shown an inconsistent ability to produce positive priming effects. This variability might be the result of self-reliant emotional reactions to odours, suggesting the occurrence of an emotional priming effect instead of a semantic priming effect as we expected. These results leave open the possibility to consider the integration of odours into speech-language pathology practice for patients with Alzheimer's disease.
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Master Thesis
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Wendy Just. Effets d'un amorçage olfactif dans une tache de décision lexicale chez le sujet présentant une maladie d'Alzheimer précoce. Médecine humaine et pathologie. 2019. ⟨dumas-02173787⟩

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