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Related Experiment Videos

Cerebral vasoreactivity in senile dementia

W J Dekoninck, M Collard, G Noel

    Gerontology
    |January 1, 1977
    PubMed
    Summary

    Clinical senile dementia patients showed varied cerebrovascular findings. Despite some vascular alterations in normal elderly individuals, cerebral autoregulation often remained intact, suggesting potential for intervention.

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    Area of Science:

    • Neurology
    • Gerontology
    • Vascular Medicine

    Background:

    • Senile dementia is a significant health concern in the elderly population.
    • Cerebrovascular health plays a crucial role in cognitive function and aging.
    • Standard examinations may not fully capture the nuances of cerebral blood flow in elderly individuals.

    Purpose of the Study:

    • To compare cerebrovascular examinations in senile dementia patients with normal elderly subjects and those with minor mental disorders or stroke sequelae.
    • To investigate regional cerebral blood flow (rCBF) and its modulation under functional tests in different elderly groups.
    • To explore the correlation between clinical symptoms and specific vascular examination findings in the elderly.

    Main Methods:

    • Utilized standard cerebrovascular examinations (fundus oculi, EEG, rheoencephalogram, cerebral angiogram, pneumonencephalogram).
    • Employed the 133Xe clearance technique to study regional cerebral blood flow (rCBF).
    • Assessed rCBF modifications under functional tests: hypercapnia, hypocapnia, and papaverine injection.

    Main Results:

    • Elderly subjects considered 'normal' often exhibited vascular alterations but maintained relative cerebral autoregulation integrity.
    • Some patients diagnosed with irreversible 'sclerosis' demonstrated good grey matter flow (rCBF) with preserved vasomotor capacity.
    • A lack of correlation was observed between clinical symptoms and specific vascular examination results across all three elderly groups.

    Conclusions:

    • Cerebral autoregulation can be relatively intact even in elderly individuals with apparent vascular changes.
    • Preserved grey matter flow and vasomotor function may exist in some 'sclerotic' patients, suggesting potential therapeutic targets.
    • Clinical presentation in elderly individuals does not always correlate directly with specific cerebrovascular examination findings, highlighting the complexity of aging and dementia.

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