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María Alejandra Castro Arbeláez1,2,3,4,5, Daisy M Acosta6,7, Eva María Arrollo-Anlló1,2

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Familiar scents like chocolate and lemon may improve self-awareness in Alzheimer's patients. This study explored olfactory stimulation

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Area of Science:

  • Neuroscience
  • Gerontology
  • Psychology

Background:

  • Alzheimer's disease (AD) poses a growing global health challenge with limited cures.
  • Olfactory stimulation offers a potential non-pharmacological intervention, particularly for semantic memory, which is less affected in AD.
  • Familiar scents can evoke autobiographical memories, potentially impacting self-awareness in individuals with AD.

Purpose of the Study:

  • To investigate the impact of familiar olfactory stimulation on self-awareness in individuals with early to moderate-stage Alzheimer's disease.
  • To assess the role of autobiographical memory in response to olfactory stimuli in Alzheimer's patients.
  • To explore a novel cognitive intervention strategy for Alzheimer's disease in the context of Latin America.

Main Methods:

  • An experimental design involving familiar olfactory stimulation (chocolate, lemon) and a placebo (distilled water).
  • Neuropsychological tests were administered to assess autobiographical episodic and semantic memory.
  • The study included 50 participants (25 experimental, 25 placebo) with early to moderate-stage Alzheimer's disease in Bogotá, Colombia.

Main Results:

  • Preliminary findings indicate positive changes in self-perception among individuals with Alzheimer's disease following olfactory stimulation.
  • The study is ongoing, with final data analysis expected by May 2025.

Conclusions:

  • Familiar olfactory stimulation, particularly with scents like chocolate and lemon, shows promise in improving self-awareness in early to moderate Alzheimer's disease.
  • Autobiographical memory may play a crucial role in the observed effects of olfactory stimulation on self-awareness.
  • This research could pave the way for accessible, non-pharmacological interventions for Alzheimer's patients, with implications for the Latin American population.