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Myasthenia Gravis: Overview and Treatment

Myasthenia Gravis: Overview and Treatment

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 leads...

Myasthenia Gravis ll: Pathophysiology

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...

Myasthenia Gravis: Diagnostic Tests

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...

Disorders of the Skeletal Muscle

Disorders of the Skeletal Muscle

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...

Chemical Synapses

Chemical Synapses

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...

Chemical Synapses

Chemical Synapses

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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Related Experiment Video

Updated: May 16, 2026

Electromyometrial Imaging of Uterine Contractions in Pregnant Women

Electromyometrial Imaging of Uterine Contractions in Pregnant Women

Published on: May 26, 2023

Myasthenia gravis during pregnancy.

Shahnaz Akhtar Chaudhry¹, Biruthvie Vignarajah, Gideon Koren

¹Motherrisk Team, Hospital for Sick Children, Toronto, Ontario, Canada.

Canadian Family Physician Medecin De Famille Canadien

|December 18, 2012

Summary

Myasthenia gravis (MG) in pregnancy is unpredictable but does not appear to harm pregnancy outcomes. Most medications are safe, and newborns need monitoring for temporary MG symptoms.

Area of Science:

Neurology
Obstetrics
Pharmacology

Background:

Myasthenia gravis (MG) is an autoimmune neuromuscular disease.
Pregnancy in women with MG presents unique clinical challenges.
MG management requires careful consideration of maternal and fetal well-being.

Purpose of the Study:

To evaluate the impact of myasthenia gravis on pregnancy outcomes.
To assess the safety of medications used for MG symptom control during pregnancy.
To provide guidance for managing pregnant patients with MG.

Main Methods:

Review of existing literature on MG and pregnancy.
Analysis of data on pregnancy outcomes in women with MG.
Assessment of safety profiles for common MG medications in pregnancy.

Related Experiment Videos

Last Updated: May 16, 2026

Electromyometrial Imaging of Uterine Contractions in Pregnant Women

Electromyometrial Imaging of Uterine Contractions in Pregnant Women

Published on: May 26, 2023

Main Results:

The course of MG during pregnancy is unpredictable.
No evidence suggests MG adversely affects pregnancy outcomes.
Most medications for MG symptom control show reassuring safety profiles during pregnancy.

Conclusions:

While MG course in pregnancy is variable, it does not appear to negatively impact pregnancy outcomes.
Pre-pregnancy thymectomy may reduce medication requirements during gestation.
Newborns of mothers with MG require vigilant monitoring for transient neonatal MG.