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Related Concept Videos

Disorders of the Skeletal Muscle01:28

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...
Skeletal Muscle Relaxants: Therapeutic Uses01:31

Skeletal Muscle Relaxants: Therapeutic Uses

Skeletal muscle relaxants are used to relax muscle tone and alleviate painful muscle contractions. However, the choice of skeletal muscle relaxants depends on the duration of the surgical procedure in order to minimize potential side effects. Skeletal muscle relaxants like neuromuscular blocking agents [NMBAs] are commonly employed as adjuvants alongside general anesthetics in clinical settings. NMBAs are also used to maintain controlled ventilation during surgery of the larynx or pharynx as...
Alterations in Muscle Tone ll01:12

Alterations in Muscle Tone ll

Alterations in muscle tone are common manifestations of neurological disorders and reflect dysfunction within different nervous system regions. Spasticity, paratonia, and dystonia represent distinct forms of hypertonia, each with unique mechanisms, clinical features, and diagnostic importance.CharacteristicsSpasticity happens from upper motor neuron lesions and is characterized by velocity-dependent resistance to passive movement. Clinical features include:Exaggerated deep tendon reflexesClonus...
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...
Classification of Skeletal Muscle Relaxants01:28

Classification of Skeletal Muscle Relaxants

Skeletal muscle relaxants are a group of drugs that can reduce muscle stiffness and induce temporary paralysis to relieve pain. These agents can act centrally to reduce muscle tone or spasms in painful conditions such as multiple sclerosis (MS), amyotrophic lateral sclerosis (ALS), or spinal injuries; they are called antispasmodics or spasmolytics.
Peripherally acting skeletal muscle relaxants interfere with the neurotransmission at the neuromuscular end plate to induce paralysis during...
Skeletal Muscle Relaxants: Adverse Effects01:21

Skeletal Muscle Relaxants: Adverse Effects

Skeletal muscle relaxants are widely used for muscle paralysis and relieving pain following any muscle injury or stiffness. However, depending on the drug type, they can have adverse effects that range from mild to severe. Usually, nondepolarizing neuromuscular blockers have minimal side effects. For example, drugs like d-tubocurarine, cisatracurium, and rocuronium cause hypotension, whereas drugs like baclofen, when stopped abruptly, can lead to the recurrence of spastic conditions.
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Related Experiment Video

Updated: Jul 4, 2026

Stimulated Single Fiber Electromyography (SFEMG) for Assessing Neuromuscular Junction Transmission in Rodent Models
04:30

Stimulated Single Fiber Electromyography (SFEMG) for Assessing Neuromuscular Junction Transmission in Rodent Models

Published on: March 8, 2024

[Emergencies in neuromuscular pathology].

T Ayuso1, I Jericó

  • 1Servicio de Neurología, Hosptal de Navarra, Pamplona, Spain. tayuso@yahoo.es

Anales Del Sistema Sanitario De Navarra
|August 19, 2008
PubMed
Summary

Acute muscle weakness (AMW) is a key symptom of neuromuscular emergencies, often requiring mechanical ventilation. Early diagnosis and treatment of Guillain-Barré syndrome (GBS) and myasthenia gravis (MG) are crucial for patient outcomes.

Area of Science:

  • Neurology
  • Emergency Medicine
  • Critical Care

Context:

  • Acute muscle weakness (AMW) presents a significant challenge in neuromuscular emergencies, particularly when impacting respiratory and oropharyngeal muscles.
  • Neuromuscular diseases like Guillain-Barré syndrome (GBS) and myasthenia gravis (MG) are leading causes of AMW and subsequent respiratory failure.
  • GBS is a primary cause of acute flaccid paralysis, with a third of cases necessitating mechanical ventilation.

Purpose:

  • To highlight the critical role of timely diagnosis and management in neuromuscular emergencies.
  • To differentiate the presentation and management strategies for GBS and myasthenia gravis (MG) crises.
  • To emphasize the importance of clinical evaluation and neurophysiological testing in guiding mechanical ventilation decisions.

Summary:

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The Muscle Cuff Regenerative Peripheral Nerve Interface for the Amplification of Intact Peripheral Nerve Signals

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Manual Muscle Testing: A Method of Measuring Extremity Muscle Strength Applied to Critically Ill Patients
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Manual Muscle Testing: A Method of Measuring Extremity Muscle Strength Applied to Critically Ill Patients

Published on: April 12, 2011

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Last Updated: Jul 4, 2026

Stimulated Single Fiber Electromyography (SFEMG) for Assessing Neuromuscular Junction Transmission in Rodent Models
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The Muscle Cuff Regenerative Peripheral Nerve Interface for the Amplification of Intact Peripheral Nerve Signals
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The Muscle Cuff Regenerative Peripheral Nerve Interface for the Amplification of Intact Peripheral Nerve Signals

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Manual Muscle Testing: A Method of Measuring Extremity Muscle Strength Applied to Critically Ill Patients
09:44

Manual Muscle Testing: A Method of Measuring Extremity Muscle Strength Applied to Critically Ill Patients

Published on: April 12, 2011

  • AMW necessitates prompt recognition, with GBS and MG being common etiologies leading to respiratory compromise.
  • GBS diagnosis allows for immunomodulatory treatment, while clinical and neurophysiological assessments guide ventilation strategies, potentially avoiding emergency intubation.
  • Myasthenic crisis, a severe MG complication, requires identifying triggers, ventilatory support, and treatments like plasmapheresis or IVIg, alongside vigilant monitoring for respiratory failure.

Impact:

  • Accurate diagnosis and early intervention in GBS can significantly alter disease course with immunomodulatory therapies.
  • Appropriate ventilatory support and pharmacological treatments (plasmapheresis, IVIg) are vital for managing myasthenic crises and preventing respiratory arrest.
  • This knowledge aids clinicians in making informed decisions regarding mechanical ventilation, optimizing patient care in neuromuscular emergencies.