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Related Concept Videos

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The Effect of Aging on Tissues

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Several body functions deteriorate with age. The external signs of aging are easily identifiable. For example, the skin becomes dry, less elastic, and thins out, forming wrinkles. The skin of the face begins to appear looser due to a decrease in the levels of elastic and collagen fibers in the connective tissue. Additionally, melanin production in the hair follicle decreases with age, resulting in gray hair. Moreover, the senses of sight and hearing decline, so glasses and hearing aids may...
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Aging01:26

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Aging is a complex biological phenomenon influenced by various processes that affect cellular and systemic functions. Several prominent theories attempt to explain its mechanisms, highlighting cellular limitations, oxidative damage, and hormonal changes as central factors in aging.
Cellular Clock Theory
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Aging and its effect on bone remodeling is the most common cause of bone disorders. In young and healthy people, bone deposition and resorption happen at an equal rate to maintain optimal bone health.
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Cognitive Development During Adulthood01:30

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Cognitive development continues throughout adulthood, undergoing significant shifts across early, middle, and late stages. Individual transition occurs from adolescent idealism to pragmatic and adaptable thinking in early adulthood. During this period, individuals learn to integrate personal beliefs with the recognition that other perspectives are equally valid. Exposure to the complexities of modern society, diverse experiences, and higher education contribute to this adaptive thought process,...
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Erik Erikson's theory of psychosocial development outlines a series of stages through which individuals progress across the lifespan. Each stage involves a psychosocial conflict that significantly influences personal growth and well-being. Three key stages — intimacy versus isolation, generativity versus stagnation, and integrity versus despair — highlight the developmental challenges faced in adulthood.
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Mitochondria are eukaryotic cellular organelles that are known to produce energy through a process called oxidative phosphorylation. Besides their primary function, mitochondria are involved in various cellular processes, including cell growth, differentiation, signaling, metabolism, and senescence. Age-related changes cause a decline in mitochondrial quality and integrity due to increased mitochondrial mutations and oxidative damage. Thus, aging can severely impact mitochondrial functions,...
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Frailty: understanding the difference between age and ageing.

Emily H Gordon1, Ruth E Hubbard1

  • 1Centre for Health Services Research, The University of Queensland, Brisbane, Australia.

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Summary
This summary is machine-generated.

Research shows ageing is not inevitable decline but a malleable process. Frailty research has advanced understanding, measurement, and management, shifting perceptions of older age and informing health policy.

Keywords:
ageingfrailtymanagementmeasurementmechanismsolder people

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Area of Science:

  • Gerontology
  • Biomedical Science
  • Public Health

Background:

  • Historically, illness and dependence were considered unavoidable aspects of aging.
  • Contemporary understanding differentiates chronological age from the aging process, which involves increased risk of adverse outcomes.
  • Frailty research over the past 50 years has revealed aging to be heterogeneous, variable, and modifiable.

Purpose of the Study:

  • To provide an overview of key achievements in frailty research and clinical practice.
  • To highlight advancements in understanding, measuring, and managing frailty.
  • To identify future research directions and address existing knowledge gaps.

Main Methods:

  • Review of significant advances in frailty measurement, including clinical features and models.
  • Exploration of insights into the pathogenesis and mechanisms of frailty.
  • Examination of interventions developed for frailty reduction and prevention.

Main Results:

  • Frailty research has led to significant progress in measurement, understanding mechanisms, and developing interventions.
  • The concept of frailty has influenced health policy and clinical practice.
  • Perceptions of older age are beginning to change among the public and healthcare professionals.

Conclusions:

  • Aging is a complex and variable process, not a predetermined decline.
  • Frailty is a key concept that has reshaped gerontological research and practice.
  • Future research should focus on addressing the numerous known unknowns in frailty.