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Related Concept Videos

Myocarditis I: Introduction01:21

Myocarditis I: Introduction

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Myocarditis is inflammation of the myocardium, which is the muscular layer of the heart.EtiologyMyocarditis has a diverse etiology, including a wide range of infectious and non-infectious causes:Infectious CausesViral: Common viruses include Coxsackie A and B, adenovirus, parvovirus B19, enteroviruses, and influenza A.Bacterial: Examples include infections caused by Streptococcus, Staphylococcus, and Mycoplasma species.Rickettsial: Infections like Rocky Mountain spotted fever can result in...
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Myasthenia Gravis ll: Pathophysiology01:22

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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...
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Myocarditis II: Clinical Features and Diagnostic Tests01:27

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Myocarditis is an inflammation of the heart muscle. The symptoms vary widely, encompassing asymptomatic presentations to severe, acute manifestations.Clinical PresentationAsymptomatic cases: In some instances, myocarditis may be asymptomatic, with the infection resolving without intervention. These cases often go undetected unless discovered incidentally through diagnostic imaging or tests conducted for other reasons.General Early Symptoms: Early symptoms of myocarditis are non-specific and can...
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Disorders of the Skeletal Muscle01:28

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The clinical conditions affecting the skeletal muscle tissue are broadly categorized as musculoskeletal and neuromuscular disorders.
Musculoskeletal disorders
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Myasthenia Gravis: Diagnostic Tests01:15

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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.
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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.
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Related Experiment Video

Updated: Apr 26, 2026

Vascular Occlusion Training for Inclusion Body Myositis: A Novel Therapeutic Approach
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Inclusion body myositis.

Mazen M Dimachkie1, Richard J Barohn2

  • 1Neuromuscular Section, Neurophysiology Division, Department of Neurology, University of Kansas Medical Center, 3901 Rainbow Boulevard, Mail Stop 2012, Kansas City, KS 66160, USA.

Neurologic Clinics
|July 20, 2014
PubMed
Summary
This summary is machine-generated.

Inclusion body myositis (IBM) is a common idiopathic inflammatory myopathy (IIM) in those over 50. Research is evolving, focusing on its degenerative aspects and new clinical trials.

Keywords:
DiagnosisIdiopathic inflammatory myopathiesInclusion body myositisPathologyPathophysiologyPolymyositisPrognosisTreatment

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Area of Science:

  • Neurology
  • Immunology
  • Rare Diseases

Background:

  • Idiopathic inflammatory myopathies (IIMs) are rare, heterogeneous disorders.
  • Inclusion body myositis (IBM) is the most frequent IIM in individuals over 50.
  • IBM shares features with other IIMs like dermatomyositis and polymyositis.

Purpose of the Study:

  • To review the historical progression of knowledge regarding IBM.
  • To highlight recent advancements in understanding IBM.
  • To discuss current and upcoming clinical trials for IBM.

Main Methods:

  • Review of existing literature on IBM.
  • Analysis of histopathological findings in IBM.
  • Examination of clinical trial data and progress.

Main Results:

  • Muscle biopsy in IBM reveals inflammatory infiltrates and protein deposits.
  • Rimmed vacuoles are a characteristic histopathological feature of IBM.
  • IBM likely possesses a significant degenerative component.

Conclusions:

  • IBM represents a complex IIM with both inflammatory and degenerative processes.
  • Ongoing research and clinical trials aim to improve diagnosis and treatment for IBM.
  • Further understanding of IBM's pathogenesis is crucial for therapeutic development.