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Plaques, tangles and dementia. A quantitative study

G K Wilcock, M M Esiri

    Journal of the Neurological Sciences
    |November 1, 1982
    PubMed
    Summary
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    Neurofibrillary tangles in the cerebral cortex strongly correlate with dementia severity in older adults. Argyrophilic plaques showed a weaker association, with the temporal lobe and hippocampus most affected in Alzheimer's disease.

    Area of Science:

    • Neuropathology
    • Neuroscience
    • Geriatrics

    Background:

    • Dementia is a growing public health concern in aging populations.
    • Understanding the neuropathological hallmarks of dementia is crucial for diagnosis and treatment.
    • Alzheimer's disease is the most common cause of dementia, characterized by specific brain changes.

    Purpose of the Study:

    • To investigate the correlation between neuropathological markers and dementia severity.
    • To examine the distribution of neurofibrillary tangles and argyrophilic plaques in the cerebral cortex and hippocampus.
    • To differentiate the roles of tangles and plaques in dementia pathology.

    Main Methods:

    • Histological examination of cerebral cortex and hippocampus from 59 deceased individuals (aged 51-102).

    Related Experiment Videos

  • Prospective assessment of dementia presence and extent in subjects.
  • Quantification of argyrophilic plaques and neurofibrillary tangles in brain tissue.

    • Main Results:

    • A strong positive correlation was observed between neurofibrillary tangle count in the cerebral cortex and dementia severity in patients without cerebrovascular disease.
    • A weaker, inconsistent correlation was found between argyrophilic plaque count and dementia severity.
    • The temporal lobe cortex and hippocampus exhibited the most significant neurofibrillary tangle pathology in senile dementia, consistent with Alzheimer's disease.

    Conclusions:

    • Neurofibrillary tangles are a primary neuropathological correlate of dementia severity in the aging brain.
    • Argyrophilic plaques play a less significant, though still present, role in dementia pathology.
    • The temporal lobe and hippocampus are critical regions affected in Alzheimer's disease-related dementia.