A look into hallucinations: the relationship between visual imagery and hallucinations in Alzheimer's disease

Mohamad El Haj, Johanna C. Badcock, Renaud Jardri, Frank Larøi, Jean Roche, Iris E. Sommer, Karim Gallouj

Research output: Contribution to journalArticle

Abstract

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.

Original languageEnglish
JournalCognitive Neuropsychiatry
DOIs
Publication statusE-pub ahead of print - 19 Jun 2019

Fingerprint

Hallucinations
Imagery (Psychotherapy)
Alzheimer Disease
Healthy Volunteers
Aptitude
Solar System
Education

Cite this

El Haj, Mohamad ; Badcock, Johanna C. ; Jardri, Renaud ; Larøi, Frank ; Roche, Jean ; Sommer, Iris E. ; Gallouj, Karim. / A look into hallucinations : the relationship between visual imagery and hallucinations in Alzheimer's disease. In: Cognitive Neuropsychiatry. 2019.
@article{5098e692e63b4273988f6600a62c3fb6,
title = "A look into hallucinations: the relationship between visual imagery and hallucinations in Alzheimer's disease",
abstract = "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.",
keywords = "Alzheimer’s disease, hallucinations, visual hallucinations, visual imagery, vividness",
author = "{El Haj}, Mohamad and Badcock, {Johanna C.} and Renaud Jardri and Frank Lar{\o}i and Jean Roche and Sommer, {Iris E.} and Karim Gallouj",
year = "2019",
month = "6",
day = "19",
doi = "10.1080/13546805.2019.1632180",
language = "English",
journal = "Cognitive Neuropsychiatry",
issn = "1354-6805",
publisher = "Psychology Press",

}

A look into hallucinations : the relationship between visual imagery and hallucinations in Alzheimer's disease. / El Haj, Mohamad; Badcock, Johanna C.; Jardri, Renaud; Larøi, Frank; Roche, Jean; Sommer, Iris E.; Gallouj, Karim.

In: Cognitive Neuropsychiatry, 19.06.2019.

Research output: Contribution to journalArticle

TY - JOUR

T1 - A look into hallucinations

T2 - the relationship between visual imagery and hallucinations in Alzheimer's disease

AU - El Haj, Mohamad

AU - Badcock, Johanna C.

AU - Jardri, Renaud

AU - Larøi, Frank

AU - Roche, Jean

AU - Sommer, Iris E.

AU - Gallouj, Karim

PY - 2019/6/19

Y1 - 2019/6/19

N2 - 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.

AB - 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.

KW - Alzheimer’s disease

KW - hallucinations

KW - visual hallucinations

KW - visual imagery

KW - vividness

UR - http://www.scopus.com/inward/record.url?scp=85067646385&partnerID=8YFLogxK

U2 - 10.1080/13546805.2019.1632180

DO - 10.1080/13546805.2019.1632180

M3 - Article

JO - Cognitive Neuropsychiatry

JF - Cognitive Neuropsychiatry

SN - 1354-6805

ER -