[en] Introduction: We investigated the relationship between visual hallucinations and vividness of visual imagery in patients with Alzheimer's disease (AD). Method: We recruited 28 patients with AD and 30 healthy control participants, matched for age and education. We evaluated proneness towards hallucinations with the Launay-Slade Hallucinations Scale, which includes items assessing visual and auditory hallucinations. We also evaluated vividness of visual imagery with the Vividness of Visual Imagery Questionnaire on which participants had to imagine four images (i.e., imagining the face of a friend, the rising sun, a familiar shop-front, and a country scene) and report the vividness of the images they generated. Results: Analysis demonstrated significant positive correlations between visual hallucinations and vividness of visual imagery in AD patients, however, no significant correlations were observed between auditory hallucinations and vividness of visual imagery in these participants. No significant correlations were observed between hallucinations and vividness of visual imagery in healthy control participants, probably due to the lack of hallucinations in these participants. Discussion: These results demonstrate a selective relationship between the occurrence of visual (but not auditory) hallucinations and the ability to generate vivid visual images in AD.
Disciplines :
Neurosciences & behavior
Author, co-author :
El Haj, Mohamad; a Laboratoire de psychologie des Pays de la Loire, LPPL, Univ Nantes , Nantes , France ; b Centre Hospitalier de Tourcoing, Unité de Gériatrie , Tourcoing , France ; c Institut Universitaire de France , Paris , France
Badcock, Johanna C ; d School of Psychological Science, University of Western Australia , Crawley , Australia
Jardri, Renaud; e UMR 9193 - SCALab - Sciences Cognitives et Sciences Affectives, Univ. Lille , Lille , France
Laroi, Frank ; Université de Liège - ULiège > Département de Psychologie ; f Department of Biological and Medical Psychology, University of Bergen (UiB) , Bergen , Norway ; h NORMENT - Norwegian Center of Excellence for Mental Disorders Research, University of Oslo , Oslo , Norway
Roche, Jean; i CHU de Lille, Unité de Psychogériatrie, Pôle de Gérontologie , Lille , France
Sommer, Iris E; f Department of Biological and Medical Psychology, University of Bergen (UiB) , Bergen , Norway ; j Department of Neuroscience and Department of psychiatry, Rijks Universiteit Groningen (RUG), University medical Center Groningen (UMCG) , Netherlands
Gallouj, Karim; b Centre Hospitalier de Tourcoing, Unité de Gériatrie , Tourcoing , France
Language :
English
Title :
A look into hallucinations: the relationship between visual imagery and hallucinations in Alzheimer's disease.
Pr. El Haj was supported by the LABEX (excellence laboratory, programme investment for the future) DISTALZ (Development of Innovative Strategies for a Transdisciplinary approach to Alzheimer disease) and the EU Interreg 2 Seas Programme 2014–2020 (co-funded by the European Regional Development Fund).
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