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Videos de Conceptos Relacionados

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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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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Myocarditis II: Clinical Features and Diagnostic Tests01:27

Myocarditis II: Clinical Features and Diagnostic Tests

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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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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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Chemical Synapses01:26

Chemical Synapses

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Chemical synapses are specialized sites between two neurons or between a neuron and a non-neuronal cell like a muscle, glandular or sensory cell.
Because chemical synapses depend on the release of neurotransmitter molecules from synaptic vesicles to pass on their signal, there is an approximately one millisecond delay between when the axon potential reaches the presynaptic terminal and when the neurotransmitter leads to opening of postsynaptic ion channels. Additionally, this signaling is...
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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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Video Experimental Relacionado

Updated: Aug 29, 2025

Induction and Diverse Assessment Indicators of Experimental Autoimmune Encephalomyelitis
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Induction and Diverse Assessment Indicators of Experimental Autoimmune Encephalomyelitis

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Comprender la encefalomielitis miálgica

Sonya Marshall-Gradisnik1, Natalie Eaton-Fitch1

  • 1National Centre for Neuroimmunology and Emerging Diseases, MHIQ, Griffith University, Gold Coast, Australia.

Science (New York, N.Y.)
|September 8, 2022
PubMed
Resumen

La encefalomielitis miálgica (EM) y el Covid largo comparten síntomas similares, lo que sugiere un vínculo potencial entre estas afecciones. Se necesita más investigación para comprender la relación y desarrollar tratamientos específicos.

Área de la Ciencia:

  • Neurología
  • Inmunología
  • Enfermedades infecciosas

Sus antecedentes:

  • La encefalomielitis miálgica (EM), también conocida como síndrome de fatiga crónica, es una enfermedad compleja de múltiples sistemas.
  • Long Covid, una condición caracterizada por síntomas persistentes después de la infección por SARS-CoV-2, afecta a una parte significativa de los sobrevivientes.
  • Tanto la EM como la covid larga presentan fatiga debilitante, disfunción cognitiva y trastornos autónomos.

Objetivo del estudio:

  • Para investigar las presentaciones clínicas superpuestas de la Encefalomielitis Miálgica y el Long Covid.
  • Explorar posibles mecanismos fisiopatológicos compartidos entre estas condiciones.

Principales métodos:

  • Una revisión sistemática de la literatura existente que compara los perfiles de síntomas de los pacientes con EM y COVID largo.

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  • Análisis de las medidas de resultado informadas por los pacientes y criterios de diagnóstico clínico.

    • Principales resultados:

    • Se identificaron coincidencias significativas en los síntomas principales, incluida la fatiga profunda, el malestar post-esfuerzo, el deterioro cognitivo (niebla cerebral) y los trastornos del sueño.
    • La disfunción autónoma, como la intolerancia ortostática, se informó con frecuencia en ambas condiciones.

    Conclusiones:

    • La sintomatología superpuesta sugiere fuertemente vías biológicas subyacentes compartidas en la Encefalomielitis Miálgica y el Long Covid.
    • Reconocer estas similitudes es crucial para el diagnóstico preciso, el manejo del paciente y el desarrollo de estrategias terapéuticas efectivas.