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Related Concept Videos

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...
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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...
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...
Inborn Errors of Metabolism01:20

Inborn Errors of Metabolism

Phenylketonuria (PKU) is a protein metabolism disorder characterized by high blood levels of the amino acid phenylalanine. This results from a mutation in the gene responsible for phenylalanine hydroxylase, an enzyme that converts phenylalanine into tyrosine. When this enzyme is deficient, phenylalanine builds up in the blood, leading to symptoms such as vomiting, rashes, seizures, growth deficiency, and severe mental retardation. An early diagnosis and a diet restricting phenylalanine intake...
Satellite Stem Cells and Muscular Dystrophy01:21

Satellite Stem Cells and Muscular Dystrophy

Satellite stem cells or myosatellite cells are quiescent stem cells that Alexander Mauro first identified in 1961. These cells are located between the sarcolemma, the plasma membrane of muscle fibers, and the basal lamina, the connective tissue sheath covering it. These mononucleated cells are activated in response to muscle injury, can transform into myoblasts, and may form or repair muscle fibers. Myosatellite cells can provide additional myonuclei for muscle regeneration or return to a...
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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.
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Related Experiment Video

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Modeling Myotonic Dystrophy 1 in C2C12 Myoblast Cells
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Published on: July 29, 2016

Congenital myopathies.

Adele D'Amico1, Enrico Bertini

  • 1Ospedale Bambino Gesù Research Chidren's Hospital, P.za S. Onofrio, 4, 00165 Rome, Italy.

Current Neurology and Neuroscience Reports
|March 28, 2008
PubMed
Summary
This summary is machine-generated.

This review details recent advances in congenital myopathies, a group of infant muscle disorders. Understanding genetic causes improves classification and guides new therapeutic strategies for these conditions.

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Last Updated: Jul 6, 2026

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Area of Science:

  • Neurology
  • Genetics
  • Pathology

Background:

  • Congenital myopathies are a heterogeneous group of muscle disorders presenting at birth or in infancy.
  • Characterized by muscle weakness and distinct histopathologic abnormalities on muscle biopsy.
  • Traditional classification relies on morphologic features observed in muscle tissue.

Purpose of the Study:

  • To review recent research advances in specific congenital myopathies.
  • To highlight the impact of molecular genetics on understanding and classifying these disorders.
  • To discuss the elucidation of pathologic mechanisms and the development of therapeutic strategies.

Main Methods:

  • Review of current scientific literature on congenital myopathies.
  • Focus on specific conditions: nemaline, myotubular, centronuclear, central core, multi-minicore, congenital fiber-type disproportion, and hyaline body myopathies.
  • Integration of histopathologic and molecular genetic findings.

Main Results:

  • Molecular genetics has refined the classification of congenital myopathies.
  • Recent advances have clarified the underlying pathologic mechanisms.
  • New insights provide a foundation for developing targeted therapeutic interventions.
  • Specific myopathies reviewed include nemaline, myotubular, and central core diseases.

Conclusions:

  • Congenital myopathies are increasingly understood through molecular genetics.
  • Advances in pathology and genetics are driving the development of novel therapies.
  • This review synthesizes current knowledge to guide future research and clinical practice.