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Delusions and dementia: clinical and CT correlates
G Binetti1, A Padovani, E Magni
1Alzheimer's Disease Unit, S. Cuore Fatebenefratelli Hospital, Brescia, Italy.
Acta Neurologica Scandinavica
|April 1, 1995
Summary
Frontal lobe white matter lesions are linked to delusions in dementia patients. This finding helps understand the brain basis of delusions in Alzheimer
Area of Science:
- Neurology
- Neuroimaging
- Geriatric Psychiatry
Background:
- Delusions are common in Alzheimer's disease (AD) and multi-infarct dementia (MID).
- The clinical significance and neuroanatomical correlates of delusions in dementia remain unclear.
- Understanding these factors is crucial for patient care and disease management.
Purpose of the Study:
- To investigate the clinical and computed tomography (CT) correlates of delusions in dementia patients.
- To identify specific brain regions associated with the occurrence of delusions.
Main Methods:
- A cohort of 67 probable AD and 32 MID patients were assessed.
- Methods included CT scans, psychometric testing, neurological and psychiatric examinations, and blood tests.
- Statistical analyses, including logistic regression, were used to correlate CT findings with delusions.
Main Results:
- Twenty-four patients (35%) experienced delusions.
- Delusional patients were significantly older than non-delusional patients.
- Isolated white matter lesions in the frontal lobes were significantly associated with delusions (Exp B = 3.42, p=0.04).
Conclusions:
- Focal lesions in the frontal areas are independently associated with delusional disorders in dementia.
- Frontal white matter changes are a key correlate of delusions in this population.
- This highlights the role of frontal lobe integrity in the manifestation of delusions.