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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.
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Elderly individuals encompass a diverse population with varying degrees of age-related physiological changes. Defining the elderly presents challenges, as the geriatric population is often arbitrarily categorized as individuals older than 65. However, many individuals in this group lead active and healthy lives, with an increasing number surpassing 85 years and falling into the older elderly category. Physiological changes associated with aging impact performance capacity and homeostatic...
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Frailty Assessment in an Aging Mouse Model
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Understanding the Physiological Links Between Physical Frailty and Cognitive Decline.

Lina Ma1,2, Piu Chan1,2,3,4

  • 11Department of Geriatrics, Xuanwu Hospital, Capital Medical University, Beijing Institute of Geriatrics, Beijing, China.

Aging and Disease
|April 8, 2020
PubMed
Summary

Aging is linked to declines in physical and cognitive function. This review explores biological links like inflammation and metabolism, aiming to identify strategies to prevent frailty and cognitive decline in older adults.

Keywords:
biologycognitive declinecognitive frailtyphysical frailty

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Area of Science:

  • Gerontology
  • Neuroscience
  • Physiology

Background:

  • Physical and cognitive functions decline with age.
  • Epidemiological studies show a link between physical frailty and cognitive decline.
  • The biological basis connecting these declines is not fully understood.

Purpose of the Study:

  • To review the physiological links between physical frailty and cognitive decline.
  • To identify potential biological mechanisms contributing to both conditions.
  • To highlight strategies for preventing and treating age-related functional decline.

Main Methods:

  • Narrative review of existing literature.
  • Discussion of potential biological pathways.
  • Synthesis of evidence linking physiological factors to frailty and cognitive decline.

Main Results:

  • Chronic inflammation, impaired stress response, imbalanced metabolism, mitochondrial dysfunction, oxidative stress, and neuroendocrine dysfunction are potential linking factors.
  • These factors may mediate the relationship between physical frailty and cognitive decline.
  • Understanding these links is crucial for developing interventions.

Conclusions:

  • Multiple physiological systems are implicated in the co-occurrence of physical frailty and cognitive decline.
  • Targeting these pathways could lead to novel therapeutic strategies.
  • Early identification and intervention are key to preventing disability in aging populations.