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Related Concept Videos

Myasthenia Gravis: Overview and Treatment01:20

Myasthenia Gravis: Overview and Treatment

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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...
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Disorders of the Skeletal Muscle01:28

Disorders of the Skeletal Muscle

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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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Satellite Stem Cells and Muscular Dystrophy01:21

Satellite Stem Cells and Muscular Dystrophy

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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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The Neuromuscular Junction01:19

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The nervous system consists of complex motor neuron circuits, including upper motor neurons originating from the cerebral cortex and lower motor neurons starting in the spinal cord, coordinating both voluntary and involuntary movements. Among these, somatic motor neurons activate skeletal muscles and are classified into alpha, beta, and gamma types. Alpha neurons are vital for voluntary movement coordination, while gamma neurons adjust muscle spindle sensitivity, and the function of beta...
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Myasthenia Gravis: Diagnostic Tests01:15

Myasthenia Gravis: Diagnostic Tests

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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...
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Parkinson's Disease: Overview01:15

Parkinson's Disease: Overview

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Neurodegenerative disorders are progressive diseases that cause irreversible damage and loss to neurons in specific brain areas. Examples of these disorders include Parkinson's disease, Alzheimer's disease, Multiple Sclerosis (MS), and Amyotrophic Lateral Sclerosis (ALS). These disorders share characteristics such as proteinopathies, selective neuronal vulnerability, and a complex interplay between genetic and environmental factors. The primary therapeutic goal for these conditions is...
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Neuromuscular disease: 2022 update.

Marta Margeta1

  • 1Department of Pathology, University of California, San Francisco USA.

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Summary

This review summarizes key 2021 advances in neuromuscular diseases, covering fundamental biology, new conditions, pathogenesis, diagnostics, and treatments for conditions like Charcot-Marie-Tooth disease and Pompe disease.

Keywords:
AutophagyCOVID-19Gene expression profilingGuillain-Barré syndromeIdiopathic inflammatory myopathyMLIPMicrovesselsOptic neuropathyPeripheral neuropathyPompe diseaseSystemic sclerosisVWA1

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Area of Science:

  • Neurology
  • Genetics
  • Immunology

Background:

  • Neuromuscular diseases encompass a wide range of debilitating conditions affecting nerve and muscle function.
  • Understanding the underlying biology and pathogenesis is crucial for developing effective treatments.

Purpose of the Study:

  • To provide a comprehensive overview of significant advancements in neuromuscular disease research reported in 2021.
  • To highlight progress across fundamental biology, disease identification, etiology, diagnostics, and therapeutics.

Main Methods:

  • Literature review of key publications and research findings from 2021 in the neuromuscular disease field.
  • Categorization of advances into overarching themes including biology, new diseases, pathogenesis, diagnostics, and therapies.

Main Results:

  • Detailed discussion of ten major advances, including neuromuscular complications of COVID-19, MLIP and VWA1-related myopathies, Leber's hereditary optic neuropathy, and tRNA synthetase-associated Charcot-Marie-Tooth disease.
  • Exploration of autophagic defects in myopathies, systemic sclerosis-associated myopathy, humoral immune endoneurial microvasculopathy, and late-onset Pompe disease.
  • Inclusion of insights into muscle/nerve regeneration and gene expression profiling for immune-mediated myopathies.

Conclusions:

  • The year 2021 saw substantial progress in understanding and managing diverse neuromuscular disorders.
  • These advances offer new hope for improved diagnostics and therapeutic strategies for patients with these conditions.