Age dependence of choroidal blood flow

Article Abstract:

Choroidal blood flow appears to diminish with age, which could increase the risk of age-related eye diseases such as macular degeneration and glaucoma. Researchers used laser interferometry to measure ocular blood flow and also measured mean arterial pressure, intraocular pressure and ocular perfusion pressure in 130 healthy volunteers. Ocular blood flow decreased with age whereas mean arterial pressure, intraocular pressure and ocular perfusion pressure increased with age.

Blood flow, Blood flow measurement, Medical examination, Eye, Eye examination, Choroid

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DHEA: elixir of youth or mirror of age?

Article Abstract:

More research is needed to determine whether dehydroepiandrosterone (DHEA) can slow the aging process in humans. It seems to do so in laboratory rats and human studies have shown that DHEA blood levels peak in the teens and 20's and then begin to decline with age. A 1998 study found that DHEA sulfate was positively correlated to lean body mass and physical fitness, at least in men. DHEA can also affect the immune system, enhance memory, and improve mood.

Health aspects, Editorial, Dehydroepiandrosterone

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Cross-sectional versus longitudinal estimates of cognitive change in nondemented older people: a CERAD study

Article Abstract:

Determining the subtle changes in cognitive function with increasing age may vary depending on the research method used. According to a longitudinal model, cognition improved somewhat in 454 older people without dementia who were tested repeatedly over five years. This trend hides an early learning effect and the impact of dropout. Cross-sectional estimates indicated a slight decline in cognition, which seems more realistic.

Methods, Evaluation, Longitudinal method, Medical research, Cognition in old age, Old age cognition, Longitudinal studies

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