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Gerontology (/ ˌ dʒ ɛr ən ˈ t ɒ l ə dʒ i / JERR-ən-TOL-ə-jee) is the study of the social, cultural, psychological, cognitive, and biological aspects of aging.The word was coined by Ilya Ilyich Mechnikov in 1903, from the Greek γέρων (gérōn), meaning "old man", and -λογία (), meaning "study of".
Theories of non-biological ageing (4 P) Pages in category "Theories of ageing" The following 31 pages are in this category, out of 31 total. ... Aging theories based ...
Pages in category "Theories of biological ageing" The following 30 pages are in this category, out of 30 total. ... Aging theories based on evolvability;
Changes occur at the cellular level and are partially explained by biological theories of adult development and aging. [1] Biological changes influence psychological and interpersonal/social developmental changes, which are often described by stage theories of human development. Stage theories typically focus on "age-appropriate" developmental ...
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.
Social theories, or concepts, [163] propose explanations for the distinctive relationships between old people and their societies. One theory, proposed in 1961, is the disengagement theory, which proposes that, in old age, a mutual disengagement between people and their society occurs in anticipation of death. By becoming disengaged from work ...
The other two psychosocial theories are the disengagement theory, with which the activity comes to odds, and the continuity theory which modifies and elaborates upon the activity theory. [ 5 ] Though in recent years the acceptance activity theory has diminished, it is still used as a standard to compare observed activity and life satisfaction ...
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 ...