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Related Concept Videos

Myasthenia Gravis: Diagnostic Tests01:15

Myasthenia Gravis: Diagnostic Tests

Myasthenia gravis is an autoimmune condition affecting neuromuscular transmission, causing generalized weakness in skeletal muscles. Initial diagnoses rely on patients' signs, symptoms, and medical history. The challenge lies in distinguishing myasthenia from other muscular dystrophies. An important diagnostic feature is the significant improvement of symptoms after administering anticholinesterase inhibitors.
The edrophonium test is a diagnostic tool for myasthenia gravis. It involves...
Alterations in Muscle Tone lll01:11

Alterations in Muscle Tone lll

Rigidity and myotonia are distinct abnormalities of muscle tone that affect resistance and relaxation during movement. Although both involve altered muscle contraction, they arise from different neurological and muscular mechanisms.CharacteristicsRigidity is characterized by uniform resistance to passive movement across the entire range, independent of speed, affecting flexors and extensors equally. It may appear as lead-pipe rigidity (smooth, constant resistance) or cogwheel rigidity...
Disorders of the Skeletal Muscle01:28

Disorders of the Skeletal Muscle

The clinical conditions affecting the skeletal muscle tissue are broadly categorized as musculoskeletal and neuromuscular disorders.
Musculoskeletal disorders
Musculoskeletal disorders involve injuries and conditions affecting the skeletal muscles and associated connective tissues. These disorders can arise from acute biomechanical stresses or chronic overuse and can occur across different age groups. Common injuries include sprains, fractures, and muscular strains, often resulting from...
Myasthenia Gravis ll: Pathophysiology01:22

Myasthenia Gravis ll: Pathophysiology

The disease process of myasthenia gravis begins at the neuromuscular junction, where antibodies attack key proteins needed for muscle activation. This immune reaction weakens signal transmission, leading to the characteristic muscle fatigue and weakness that define the condition.Immune-Mediated DamageIn most individuals, antibodies target acetylcholine receptors (AChRs) on the postsynaptic membrane of muscle cells. By blocking acetylcholine binding, these antibodies prevent the nerve signal...
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...
Myasthenia Gravis: Overview and Treatment01:20

Myasthenia Gravis: Overview and Treatment

Myasthenia gravis is a neuromuscular transmission disorder characterized by weakness and increased fatigability of skeletal muscles. It is an autoimmune disease affecting approximately one in 2000 people, where antibodies against the α1 subunit of nicotinic acetylcholine receptors are produced.
These antibodies interfere with the function of the nicotinic receptors in three ways: by binding to the receptor and disrupting acetylcholine binding; by causing cross-linking of receptors which leads...

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Related Experiment Video

Updated: Jun 11, 2026

Manual Muscle Testing: A Method of Measuring Extremity Muscle Strength Applied to Critically Ill Patients
09:44

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Published on: April 12, 2011

Myopathies in the elderly: a hospital-based study.

Andoni Echaniz-Laguna1, Michel Mohr, Béatrice Lannes

  • 1Département de Neurologie, Hôpital Civil, BP 426, 67091 Strasbourg, France. Echaniz-Laguna@medecine.u-strasbg.fr

Neuromuscular Disorders : NMD
|July 13, 2010
PubMed
Summary

Elderly patients frequently develop myopathies, with inflammatory types often linked to cancer. Recognizing these geriatric myopathies is crucial for effective clinical management and genetic counseling.

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Area of Science:

  • Neurology
  • Geriatrics
  • Pathology

Background:

  • Aging populations in Western countries are experiencing an increase in myopathies.
  • Myopathies are often underdiagnosed in elderly individuals, complicating management.
  • Understanding the specific characteristics of geriatric myopathies is essential for timely diagnosis and treatment.

Purpose of the Study:

  • To investigate the prevalence and characteristics of myopathies in elderly patients (age >70).
  • To compare myopathy presentation in elderly versus younger adult patients.
  • To highlight the diagnostic and management implications of geriatric myopathies.

Main Methods:

  • Retrospective analysis of 270 adult patients with biopsy-proven myopathy diagnosed between 2003-2009.
  • Categorization of myopathies by cause: inflammatory, genetic, unspecified, and toxic.
  • Comparison of clinical presentation, including muscle weakness, serum creatine kinase, myalgia, and associated conditions, between elderly and younger patient groups.

Main Results:

  • Fifty elderly patients (18%) over 70 years old were identified.
  • Inflammatory myopathy was most common in the elderly (50%), followed by genetic (32%).
  • Elderly patients more frequently presented with myalgia, inflammatory myopathy, and cancer compared to younger patients, with no difference in muscle weakness or creatine kinase levels.

Conclusions:

  • Myopathies in the elderly are a significant and emerging clinical entity in developed countries.
  • Myalgia and inflammatory myopathies, frequently associated with cancer, are key features of geriatric myopathies.
  • Awareness of geriatric myopathies is vital for clinicians to improve patient management, treatment strategies, and genetic counseling.