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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...
Encephalitis l: Introduction01:19

Encephalitis l: Introduction

Encephalitis is inflammation of the brain parenchyma, most often due to infections or autoimmune processes. It presents with neuropsychiatric features such as fever, altered mental status, behavioral changes, cognitive dysfunction, seizures, focal deficits, and sometimes autonomic instability. In some cases, the meninges are also involved, resulting in meningoencephalitis.Infectious CausesInfectious encephalitis is most commonly viral but can also result from bacterial, fungal, or parasitic...
Myocarditis II: Clinical Features and Diagnostic Tests01:27

Myocarditis II: Clinical Features and Diagnostic Tests

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...
Encephalitis ll: Pathophysiology01:26

Encephalitis ll: Pathophysiology

Encephalitis is inflammation of the brain parenchyma caused by direct viral invasion or immune-mediated mechanisms triggered by infections or tumors. Both processes lead to neuronal injury, disrupted neurotransmission, and diverse neurological symptoms, often with overlapping clinical and pathological features.Autoimmune EncephalitisIn autoimmune encephalitis, antibodies target neuronal antigens on cell surfaces, synapses, or within neurons. A key example is anti-NMDAR encephalitis, which can...
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...
Viral Meningitis01:18

Viral Meningitis

Viral meningitis is the most common form of meningitis and is often referred to as aseptic meningitis to indicate the absence of bacterial involvement. It is generally milder than bacterial meningitis, with symptoms including fever, headache, stiff neck, drowsiness, nausea, photophobia, and vomiting. Rarely, more severe manifestations or death may occur. Common causative agents include enteroviruses, particularly coxsackie A and B viruses and echoviruses, all members of the Enterovirus genus...

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Updated: May 30, 2026

Induction and Clinical Scoring of Chronic-Relapsing Experimental Autoimmune Encephalomyelitis
26:48

Induction and Clinical Scoring of Chronic-Relapsing Experimental Autoimmune Encephalomyelitis

Published on: July 4, 2007

Myalgic encephalomyelitis: International Consensus Criteria.

B M Carruthers1, M I van de Sande, K L De Meirleir

  • 1Department of Physiology and Medicine, Vrije University of Brussels, Himmunitas Foundation, Brussels, Belgium. bcarruth@telus.net

Journal of Internal Medicine
|July 23, 2011
PubMed
Summary
This summary is machine-generated.

The term myalgic encephalomyelitis (ME) is more appropriate than chronic fatigue syndrome (CFS) due to identified inflammation and neuropathology. New criteria aim to improve ME diagnosis and research consistency globally.

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Area of Science:

  • Neurology
  • Immunology
  • Pathophysiology

Background:

  • The term Chronic Fatigue Syndrome (CFS) has been used due to a lack of understanding of its causes and disease processes.
  • Recent research indicates widespread inflammation and multisystemic neuropathology, suggesting a need for a more accurate term.
  • Myalgic Encephalomyelitis (ME) aligns with the underlying pathophysiology and neurological classification (ICD G93.3).

Purpose of the Study:

  • To develop updated diagnostic criteria for Myalgic Encephalomyelitis (ME) based on current scientific knowledge.
  • To establish criteria that reflect the complex symptomatology of ME.
  • To enhance the clarity and specificity of ME diagnosis for clinical and research applications.

Main Methods:

  • An International Consensus Panel of clinicians and researchers from 13 countries was convened.
  • The panel utilized extensive clinical experience, peer-reviewed publications, and medical databases.
  • A Delphi-type process ensured 100% consensus among panel members, independent of any sponsoring organization.

Main Results:

  • New criteria for ME were developed, reflecting complex symptomatology.
  • Operational notes were created to enhance the clarity and specificity of symptom interpretation.
  • Guidelines for clinical and research application were established to improve diagnostic consistency.

Conclusions:

  • The term Myalgic Encephalomyelitis (ME) is recommended over Chronic Fatigue Syndrome (CFS) to better represent the disease's pathophysiology.
  • The new criteria aim to improve the recognition and diagnosis of ME in adult and pediatric patients worldwide.
  • Enhanced diagnostic consistency will facilitate more accurate patient identification for research studies and clinical care.