Article excerpts about the
causes of Aging:
One longstanding theory of aging suggests that the buildup of damage from
oxidative processes in neurons causes a loss of function. Scientists believe
that free radicals produced through oxidative mechanisms play a role in several
diseases, including cancer and AD. (Source: excerpt from NIA's Progress Report on Alzheimer's Disease, 1998: NIA)
The following medical news items are relevant to causes of Aging:
As with all medical conditions, there may be many causal factors. Further relevant information on causes of Aging may be found in:
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Age-related macular degeneration results from underlying pathologic changes that occur primarily at the level of the retinal pigment epithelium, Bruch’s membrane, and the choriocapillaris in the macular region. Drusen (bumps), which are common in elderly people, appear as yellow deposits beneath the pigment epithelium and may be prominent in the macula. No predisposing conditions have been identified; however, some forms of the disorder are hereditary.
Macular degeneration is the most common cause of legal blindness in adults, accounting for about 12% of blindness cases in the United States and for about 17% of new blindness cases. It’s also one of the causes of severe irreversible loss of central vision in elderly people — by age 75, almost 15% of people have this condition. Whites have the highest incidence. Other risk factors are family history and cigarette smoking.
Source: Professional Guide to Diseases (Eighth Edition), 2005
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