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Evaluation of the Cognitive Performance of Hypertensive Patients with Silent Cerebrovascular Lesions
Published on: April 23, 2021
Cerebral microinfarcts: the invisible lesions.
Eric E Smith1, Julie A Schneider, Joanna M Wardlaw
1Department of Clinical Neurosciences, Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada.
The Lancet. Neurology
|February 21, 2012
Summary
Microinfarcts, tiny brain lesions, are more numerous than visible lacunar infarcts and may significantly contribute to cognitive decline. Detecting these microscopic injuries is crucial for understanding neurological dysfunction.
Area of Science:
- Neurology
- Neuroscience
- Pathology
Background:
- Lacunar infarcts are linked to cognitive decline, as shown by radiological and pathological studies.
- Microinfarcts are smaller, more numerous brain lesions often missed by conventional MRI.
- These lesions stem from small vessel diseases like arteriolosclerosis and cerebral amyloid angiopathy.
Purpose of the Study:
- To review the significance of microinfarcts in cognitive decline.
- To highlight the challenges in detecting microinfarcts using current imaging techniques.
- To emphasize the need for standardized assessment and non-invasive detection methods.
Main Methods:
- Review of population-based radiological and pathological studies.
- Microscopic examination of brain sections to identify microinfarcts.
- Discussion of limitations of conventional structural MRI and potential of diffusion-weighted imaging.
Main Results:
- Microinfarcts are substantially more numerous than lacunar infarcts.
- They are often undetected by conventional MRI but detectable by diffusion-weighted imaging.
- Their widespread distribution suggests a significant role in disrupting cognitive networks.
Conclusions:
- Microinfarcts likely contribute to neurological dysfunction and cognitive decline.
- Standardized neuropathological assessment is needed.
- Development of non-invasive in-vivo detection methods is essential for future research.
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