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Reduction in regional cerebral blood flow during normal aging in man
Stroke
|January 1, 1980
Summary
Cerebral blood flow declines progressively with age, starting earlier than previously thought. This study shows reduced regional cerebral blood flow (rCBF) in healthy adults across a wide age range.
Area of Science:
- Neurology
- Gerontology
- Physiology
Background:
- Regional cerebral blood flow (rCBF) is a key indicator of brain health.
- Age-related changes in rCBF are not fully understood across the adult lifespan.
Purpose of the Study:
- To investigate the relationship between age and rCBF in healthy adults.
- To determine if rCBF decline begins before old age.
Main Methods:
- Measured rCBF using the 133Xenon inhalation method.
- Calculated the initial slope index (ISI) for rCBF quantification.
- Studied 44 healthy, normotensive individuals aged 19-79 years.
Main Results:
- Significant reductions in mean brain and hemispheric ISI with advancing age.
- rCBF decline observed across all measured brain areas in both hemispheres.
- ISI values decreased progressively across the studied age spectrum.
Conclusions:
- Age-related decline in rCBF is a progressive phenomenon.
- This decline begins earlier in adulthood than previously assumed.
- Findings highlight the importance of monitoring rCBF throughout adult life.