Related Experiment Video
Updated: Sep 25, 2026

Examining the Characteristics of Episodic Memory using Event-related Potentials in Patients with Alzheimer's Disease
Published on: August 30, 2011
Delusions of Japanese patients with Alzheimer's disease
Manabu Ikeda1, Kazue Shigenobu, Ryuji Fukuhara
1Department of Neuropsychiatry, Ehime University School of Medicine, Ehime, Japan. mikeda@m.ehime-u.ac.jp
Background:
Delusions constitute one of the most prominent psychiatric complications in Alzheimer's disease (AD). However, there is little consensus of the prevalence and associated factors for delusions in AD.
Aims:
To reveal the characteristics of delusions among Japanese patients with AD.
Method:
112 consecutive patients with AD were recruited over a one year period and administered the Neuropsychiatric Inventory (NPI).
Results:
Delusions were present in 53 patients (47.3%). Delusions of theft were the most common type of delusion (75.5% of patients with delusions), followed by misidentification delusions and delusions of suspicion. More hallucination, agitation, and female gender were found in the delusions group.
Conclusions:
The authors found a high frequency of delusions, particularly of delusions of theft and suggested that gender was associated with the expression of delusions in Japanese patients with AD.
Related Concept Videos
Alzheimer's Disease: Overview
The clinical diagnosis of AD hinges on the presence of memory and other cognitive impairments. Biomarkers, such as changes in Aβ and tau...
Alzheimer Disease l: Introduction
Alzheimer's Disease: Treatment
Positive Symptoms Schizophrenia: Hallucinations and Delusions
Hallucinations
Hallucinations in...
Positive Symptoms of Schizophrenia: Hallucinations and Delusions
Thought Disorders
Disorganized and unusual thought processes mark thought disorders in schizophrenia. One key feature is disorganized speech, where an individual's conversation includes loosely...
Dementia
The progression of dementia is generally gradual.
