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Convex third ventricle: a possible sign for dementia using MRI
A L Powell1, R S Mezrich, A C Coyne
1Department of Neurology, UMDNJ Robert Wood Johnson Medical School, Brunswick 08903.
Journal of Geriatric Psychiatry and Neurology
|October 1, 1993
Summary
The shape of the third ventricle may indicate dementia. Demented individuals were more likely to have a convex third ventricle, suggesting a potential correlation between ventricular shape and cognitive decline.
Area of Science:
- Neuroimaging
- Neurology
- Radiology
Background:
- Memory impairment is a common concern, often evaluated using magnetic resonance imaging (MRI).
- Dementia, including Alzheimer's type dementia (DAT) and multi-infarct dementia (MID), significantly impacts cognitive function.
Purpose of the Study:
- To investigate the relationship between the shape and thickness of the third ventricle and dementia.
- To compare third ventricle morphology in patients with various cognitive impairments and healthy controls.
Main Methods:
- Utilized magnetic resonance imaging (MRI) to assess third ventricle shape and thickness.
- Compared 46 patients with memory impairment to 23 control subjects.
- Analyzed patient diagnoses including probable DAT, MID, depression, alcoholic dementia, and other dementias.
Main Results:
- Demented subjects showed a higher likelihood of having a convex third ventricle and greater wall separation compared to non-demented individuals.
- Patients with DAT exhibited more severe cognitive impairment (lower Mini-Mental State Examination scores) than other diagnostic groups.
- No significant differences in symptom duration or education levels were found across diagnostic categories within the study group.
Conclusions:
- The shape of the third ventricle may serve as a potential imaging biomarker correlating with dementia.
- The findings suggest a possible involvement of the dorsal medial nucleus of the thalamus in the pathophysiology of dementia.