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Related Concept Videos

Pharmacodynamics in Geriatric Patients: Effects of Age01:27

Pharmacodynamics in Geriatric Patients: Effects of Age

Age-related pharmacokinetic changes are extensively documented, but understanding age-related pharmacodynamic alterations is relatively limited. This knowledge gap can be partly attributed to the complexity of developing appropriate measures of drug responses compared to bioanalytical methods for determining drug concentrations.Most information regarding age-related differences in human pharmacodynamics originates from cross-sectional studies. However, these studies assume that observed mean...
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...
Bone Disorders01:29

Bone Disorders

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.
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...
Changes in the Appendicular Skeleton with Age01:09

Changes in the Appendicular Skeleton with Age

The upper and lower limb initially develops as a small bulge called a limb bud, which appears on the lateral side of the early embryo. The upper limb bud appears near the end of the fourth week of development, with the lower limb bud appearing shortly after.
Initially, the limb buds consist of a core of mesenchyme covered by a layer of ectoderm. The ectoderm at the end of the limb bud thickens to form a narrow crest called the apical ectodermal ridge. This ridge stimulates the underlying...
Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Metabolism01:18

Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Metabolism

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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Updated: Jun 17, 2026

The Creation of a Rat Model for Osteosarcopenia via Ovariectomy
03:52

The Creation of a Rat Model for Osteosarcopenia via Ovariectomy

Published on: February 21, 2025

[Sarcopenia: a new geriatric hot topic].

J-P Michel1, P O Lang, A J Cruz-Jentoft

  • 1Département de réhabilitation et gériatrie, Faculté de médecine et HUG, 1211 Genève 14.

Revue Medicale Suisse
|December 10, 2009
PubMed
Summary
This summary is machine-generated.

Sarcopenia, common in older adults, involves muscle loss and functional decline. Understanding its causes and implementing combined nutritional, pharmacological, and exercise interventions is key to managing this geriatric condition.

Related Experiment Videos

Last Updated: Jun 17, 2026

The Creation of a Rat Model for Osteosarcopenia via Ovariectomy
03:52

The Creation of a Rat Model for Osteosarcopenia via Ovariectomy

Published on: February 21, 2025

Area of Science:

  • Geriatrics
  • Muscle Physiology
  • Aging Research

Context:

  • Sarcopenia is highly prevalent in individuals over 65.
  • It leads to significant functional decline and negative health outcomes.
  • The pathophysiology of sarcopenia remains incompletely understood.

Purpose:

  • To detail the origin, risk factors, and clinical presentation of sarcopenia.
  • To outline diagnostic criteria including risk factor identification and muscular assessment.
  • To discuss current and future therapeutic strategies for sarcopenia.

Summary:

  • Sarcopenia's origins and risk factors require further elucidation.
  • Diagnosis involves identifying risk factors, specific muscular assessments, and a pragmatic clinical approach.
  • Effective treatment combines nutritional supplements and/or drugs with moderate-intensity physical exercise.

Impact:

  • Improved understanding of sarcopenia pathophysiology is needed.
  • Current treatments necessitate a multimodal approach.
  • Geriatricians seek novel therapies to mitigate frailty and daily living impairments associated with sarcopenia.