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Related Concept Videos

The Effect of Aging on Tissues01:19

The Effect of Aging on Tissues

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...
Aging01:26

Aging

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
The cellular clock theory posits that the human lifespan is closely tied to the finite capacity of cells to divide, a phenomenon governed by telomeres, which are protective caps at the ends of...
Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Distribution01:00

Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Distribution

Drug distribution in the human body is influenced by several factors, including plasma protein concentration, body composition, blood flow, tissue-protein concentration, and tissue fluid pH. Among these, changes in plasma protein concentration and body composition due to aging significantly affect how drugs are distributed within the body. Specifically, aging is associated with a decrease in albumin levels by about 10% and an increase in α1-acid glycoprotein levels. These alterations are not...
Cognitive Development During Adulthood01:30

Cognitive Development During Adulthood

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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Geriatric patients show significant variation in how their bodies process medications, which can change how effective and safe treatments are. The liver is the primary organ where drug metabolism occurs, involving two main types of chemical reactions: phase I and II. Phase I metabolism is driven by the cytochrome P450 enzyme system, which includes key types such as CYP3A, CYP2D6, and CYP2C9. Research indicates that while aging doesn't notably alter the levels or activity of these enzymes, it...
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Related Experiment Video

Updated: Jun 2, 2026

An Experimental Paradigm for Measuring the Effects of Ageing on Sentence Processing
04:30

An Experimental Paradigm for Measuring the Effects of Ageing on Sentence Processing

Published on: October 25, 2019

[Ageing in the early modern age].

Silvia Marinozzi1

  • 1Sezione di Storia della Medicina, Dipartimento di Medicina Sperimentale, Sapienza Università di Roma, Italy. silvia.marinozzi@uniroma1.it

Medicina Nei Secoli
|May 14, 2011
PubMed
Summary

Ancient medicine viewed aging as a natural decline in innate heat and moisture. Treatments focused on conserving vital factors to delay senescence and promote longevity.

Area of Science:

  • History of Medicine
  • Physiology
  • Gerontology

Context:

  • Ancient medical theories attributed aging to the depletion of innate heat and radical moisture.
  • Philosophers like Aristotle and physicians like Galen developed early concepts of senescence.
  • Medieval and Renaissance medicine continued these theories, linking life span to vital heat and moisture levels.

Purpose:

  • To trace the historical evolution of aging theories in ancient medicine.
  • To analyze the concepts of innate heat and radical moisture in understanding senescence.
  • To explore early medical interventions aimed at longevity.

Summary:

  • Ancient medical thought conceptualized aging as a natural process of cooling and drying, linked to the consumption of innate heat and radical moisture.

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Assessment of Age-related Changes in Cognitive Functions Using EmoCogMeter, a Novel Tablet-computer Based Approach
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Assessment of Age-related Changes in Cognitive Functions Using EmoCogMeter, a Novel Tablet-computer Based Approach

Published on: February 14, 2014

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An Experimental Paradigm for Measuring the Effects of Ageing on Sentence Processing
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Published on: October 25, 2019

Assessment of Age-related Changes in Cognitive Functions Using EmoCogMeter, a Novel Tablet-computer Based Approach
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Assessment of Age-related Changes in Cognitive Functions Using EmoCogMeter, a Novel Tablet-computer Based Approach

Published on: February 14, 2014

  • Aristotle's lamp analogy and Galen's doctrine of marasmos provided frameworks for understanding aging and its symptoms.
  • Medieval and Renaissance scholars believed life span was determined by the balance of innate heat and radical moisture, advocating lifestyle regimens (regimina vitae) for health preservation.

    • Impact:

    • Provides historical context for modern aging research.
    • Highlights the enduring influence of ancient physiological concepts.
    • Demonstrates the early focus on lifestyle interventions for longevity.