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In 1968 it took the form and became known as the neuroendocrine theory of aging. [38] [39] [40] 1956 Denham Harman proposed the free-radical theory of aging and demonstrated that free radical reactions contribute to the degradation of biological systems. [41] The theory is based on the ideas of Rebeca Gerschman and her colleagues put forward in ...
The two theories; non-adaptive, and adaptive, are used to explain the evolution of senescence, which is the decline in reproduction with age. [8] The non-adaptive theory assumes that the evolutionary deterioration of human age occurs as a result of accumulation of deleterious mutations in the germline. [8]
In 1954 Vladimir Dilman proposed hypothesis of aging that at first become known only in the USSR, as the elevation hypothesis. In 1968 it took the form and became known as the neuroendocrine theory of aging. [3] [4] [5]
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In 1969 Harman became concerned that few of those involved in gerontology were studying the biological aspects of aging, and fewer still had a serious interest in discovering the cause of aging. In 1970 he became a founder of the American Aging Association (AGE) to create a society of scientists focused on aging research and advocacy of aging ...
Biogerontology should not be confused with geriatrics, which is a field of medicine that studies the treatment of existing disease in aging people, rather than the treatment of aging itself. There are numerous theories of aging, and no one theory has been entirely accepted.
Aging studies is an interdisciplinary field, which can be affiliated with the wider approaches found in cultural studies, gender studies, media and film studies, consumer culture, etc. Researchers working in this field interrogate the cultural discourses and practices that construct the meaning of ageing.
Despite Charles Darwin's completion of his theory of biological evolution in the 19th century, the modern logical framework for evolutionary theories of aging wouldn't emerge until almost a century later. Though August Weismann did propose his theory of programmed death, it was met with criticism and never gained mainstream attention. [3]