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Olfactory hallucinations in Alzheimer’s disease

Abstract : Abstract We assessed the frequency, duration, and degree of unpleasantness of olfactory hallucinations in Alzheimer’s disease (AD). Informants of 31 AD patients were invited to rate the frequency, duration, and degree of unpleasantness of olfactory, auditory, and visual hallucinations. Analysis demonstrated little occurrence of olfactory hallucinations compared with auditory or visual hallucinations. Results also demonstrated that olfactory hallucinations span from a few seconds to one minute, a duration that was similar to that of auditory and visual hallucinations. Olfactory hallucinations were rated as unpleasant compared with auditory or visual hallucinations. Finally, olfactory hallucinations were significantly correlated with depression. Our findings demonstrate little occurrence of olfactory hallucinations but that when they occur, they are experienced as relatively unpleasant in AD patients. Our findings also demonstrate a relationship between olfactory hallucinations and psychiatric characteristics (i.e., depression) in AD.
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http://hal.univ-nantes.fr/hal-03349628
Contributor : Mohamad El Haj Connect in order to contact the contributor
Submitted on : Monday, September 20, 2021 - 4:03:05 PM
Last modification on : Tuesday, September 21, 2021 - 3:27:33 AM

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Mohamad El Haj, Frank Larøi. Olfactory hallucinations in Alzheimer’s disease. Acta Neuropsychiatrica, Cambridge University Press (CUP), 2021, 33 (1), pp.37-42. ⟨10.1017/neu.2020.33⟩. ⟨hal-03349628⟩

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