By Douglas E. Crews
Combining anthropological, gerontological and biocultural proof, this research explores how people got here to become old as slowly as they do, and what affects this has had on their health and wellbeing and lives. it's only relatively contemporary that people have constructed late-life survival, yet a lot of the study on senescence is predicated on remoted cells, worms, and fruit flies, that may be basically of peripheral relevance to human getting older.
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Additional info for Human Senescence: Evolutionary and Biocultural Perspectives
Sample text
A standard physician’s examination likely provides as much information on future life span as does the calculation of BA. Senescence is an individual phenomenon and most physiological functions increase in variance with increasing age. Analyses of “normal” and “normative” provide few insights into these patterns, nor do they inform us of how individuals are experiencing old age and senescence. Furthermore, current norms are based on historical trends and patterns and are unlikely to apply to elders today – or to tomorrow’s either.
Standard deviations) are observed at both the individual and population level. , blood pressure, glycemia) between MRP and late adulthood (ages 50– 64) vary more widely between individuals than do height, weight, or fatness. Reproductive adulthood is commonly defined as the period between menarche and menopause for woman. It is arbitrarily set between MRP and age 50 in men, who may reproduce in their ninth decade. Reproductive adulthood may be further divided into early reproductive (ages 20–34) and late reproductive (ages 35–49) stages, based on variable reproductive efforts, mate acquisition, reproduction, infant care, late child-rearing and fledging, and grandparenting.
Rate-of-living theories address the questions of how, not why, we senesce, and may apply to senescence in specific organisms or organ systems composed of variable numbers of redundant sub-units. Age-related, age-determined, and senescent “Age-related” changes are changes in physiology, structure, or function that show an increase in the probability of occurrence with increasing age. These 20 Introduction and background need not manifest in all individuals at the same age or even occur in all prior to death.