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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...
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...
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...
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...
Alterations in Muscle Tone ll01:12

Alterations in Muscle Tone ll

Alterations in muscle tone are common manifestations of neurological disorders and reflect dysfunction within different nervous system regions. Spasticity, paratonia, and dystonia represent distinct forms of hypertonia, each with unique mechanisms, clinical features, and diagnostic importance.CharacteristicsSpasticity happens from upper motor neuron lesions and is characterized by velocity-dependent resistance to passive movement. Clinical features include:Exaggerated deep tendon reflexesClonus...

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Related Experiment Video

Updated: May 11, 2026

Utility of Dissociated Intrinsic Hand Muscle Atrophy in the Diagnosis of Amyotrophic Lateral Sclerosis
08:16

Utility of Dissociated Intrinsic Hand Muscle Atrophy in the Diagnosis of Amyotrophic Lateral Sclerosis

Published on: March 4, 2014

Diagnostic workup for neuromuscular diseases.

Michel Fardeau1, Isabelle Desguerre

  • 1Institute of Myology, INSERM U1016, Salpêtrière Hospital, Paris, France.

Handbook of Clinical Neurology
|April 30, 2013
PubMed
Summary

Diagnosing pediatric neuromuscular diseases requires a specialized approach, utilizing clinical evaluation, electromyography, muscle biopsy, and MRI. A multidisciplinary team is crucial for accurate diagnosis and management of these complex conditions.

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Measurements of Motor Function and Other Clinical Outcome Parameters in Ambulant Children with Duchenne Muscular Dystrophy
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Measurements of Motor Function and Other Clinical Outcome Parameters in Ambulant Children with Duchenne Muscular Dystrophy

Published on: January 12, 2019

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Last Updated: May 11, 2026

Utility of Dissociated Intrinsic Hand Muscle Atrophy in the Diagnosis of Amyotrophic Lateral Sclerosis
08:16

Utility of Dissociated Intrinsic Hand Muscle Atrophy in the Diagnosis of Amyotrophic Lateral Sclerosis

Published on: March 4, 2014

Measurements of Motor Function and Other Clinical Outcome Parameters in Ambulant Children with Duchenne Muscular Dystrophy
09:18

Measurements of Motor Function and Other Clinical Outcome Parameters in Ambulant Children with Duchenne Muscular Dystrophy

Published on: January 12, 2019

Area of Science:

  • Neurology
  • Pediatrics
  • Genetics

Background:

  • Neuromuscular diseases present diverse clinical symptoms based on age and affected area (spinal motor neuron, nerve, neuromuscular junction, muscle).
  • Diagnostic tools are age-dependent and guided by clinical suspicion.
  • Seven distinct clinical presentations in children necessitate specialized diagnostic facilities.

Purpose of the Study:

  • To outline the diagnostic approach for pediatric neuromuscular diseases.
  • To highlight the importance of age-specific clinical presentations and investigations.
  • To emphasize the role of a multidisciplinary approach in diagnosis and management.

Main Methods:

  • Clinical evaluation and identification of seven key pediatric neuromuscular disease presentations.
  • Electrophysiological investigations (electromyography) for suspected neurogenic involvement.
  • Muscle biopsy as a primary diagnostic tool, applicable at all ages.
  • Muscle MRI to guide genetic testing and identify distinct genetic forms.
  • Molecular biology for enhanced diagnostic strategies.

Main Results:

  • Specific clinical presentations aid in diagnosing pediatric neuromuscular diseases.
  • Electromyography is valuable but challenging in children.
  • Muscle biopsy remains a key investigation across all ages.
  • Muscle MRI and genetic testing refine diagnosis and identify specific disorders.
  • A specialized, multidisciplinary approach is essential for accurate diagnosis and follow-up.

Conclusions:

  • Accurate diagnosis of pediatric neuromuscular diseases relies on a combination of clinical assessment, specialized investigations, and genetic analysis.
  • A multidisciplinary team approach is paramount for effective diagnosis and patient management.
  • Early and accurate diagnosis through specialized care improves outcomes for children with neuromuscular disorders.