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Myasthenia Gravis ll: Pathophysiology01:22

Myasthenia Gravis ll: Pathophysiology

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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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Chronic Inflammation: Introduction01:12

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Chronic inflammation is a prolonged, dysregulated immune response that persists for weeks to years when the inciting stimulus is difficult to eradicate or when self‑antigens drive ongoing reactivity. Morphologically, it is defined by mononuclear cell infiltration, progressive tissue destruction, and concurrent attempts at healing via angiogenesis and fibrosis. Compared with acute inflammation, edema is less prominent while cellular infiltration predominates; triggers include persistent...
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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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Acute Inflammation I: Inflammatory Response01:26

Acute Inflammation I: Inflammatory Response

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Acute inflammation is a rapid, short-lived physiological response to tissue injury or infection, designed to eliminate harmful agents and initiate repair. This tightly regulated process typically lasts from minutes to several days and is triggered by factors such as microbial invasion, physical trauma, or chemical injury.Recognition and Mediator ReleaseThe inflammatory response begins when resident immune cells—such as mast cells, macrophages, and dendritic cells—detect...
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Myasthenia Gravis: Overview and Treatment01:20

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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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Bacterial meningitis typically begins when pathogens such as Neisseria meningitidis and Streptococcus pneumoniae colonize the nasopharynx and invade the bloodstream. This process is facilitated by bacterial virulence factors, such as polysaccharide capsules, which resist phagocytosis and complement-mediated killing. Less commonly, bacteria reach the central nervous system via contiguous spread from infections like otitis media or sinusitis, through congenital or acquired dural defects, or...
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Acute inflammatory myelopathies.

Bruce A C Cree1

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

Handbook of Clinical Neurology
|February 11, 2014
PubMed
Summary
This summary is machine-generated.

Spinal cord inflammation causes weakness and sensory loss. This review explores inflammatory myelitis causes, including multiple sclerosis and neuromyelitis optica, aiding diagnosis through imaging and cerebrospinal fluid analysis.

Keywords:
acute transverse myelitiscerebrospinal fluidinflammationneuromyelitis opticapartial myelitispediatric transverse myelitisprogressive necrotic myelopathy

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Area of Science:

  • Neurology
  • Immunology
  • Spinal Cord Medicine

Background:

  • Inflammatory spinal cord injury presents with distinct clinical features like bilateral weakness, sensory deficits, and bowel/bladder dysfunction.
  • Prompt recognition is crucial for initiating imaging studies to rule out compressive causes.
  • Magnetic Resonance Imaging (MRI) and cerebrospinal fluid (CSF) analysis are key diagnostic tools for identifying myelitis.

Purpose of the Study:

  • To review the clinical presentation and diagnostic approaches for inflammatory spinal cord injury.
  • To explore the diverse etiologies of non-compressive myelitis.
  • To discuss the relationship between inflammatory spinal cord injury and various neurological and systemic diseases.

Main Methods:

  • Literature review focusing on inflammatory spinal cord injury.
  • Analysis of diagnostic criteria for myelitis using MRI and CSF findings.
  • Examination of associations with conditions like multiple sclerosis, neuromyelitis optica, and autoimmune diseases.

Main Results:

  • Inflammatory spinal cord injury is characterized by specific neurological deficits.
  • MRI with contrast enhancement and CSF leukocytosis support a myelitis diagnosis.
  • Numerous inflammatory etiologies exist, including infectious, autoimmune, and idiopathic causes.

Conclusions:

  • Inflammatory spinal cord injury requires a systematic diagnostic approach.
  • Understanding the differential diagnoses, including demyelinating and systemic inflammatory conditions, is essential.
  • This review provides a comprehensive overview of inflammatory myelitis and its related diseases.