218 results
Myasthenia Gravis Overview

Myasthenia Gravis is an autoimmune disorder of the postsynaptic neuromuscular junction.  Ab to
Clinical Picture ... variable degree of weakness ... Limb- proximal weakness ... Diagnosis - Clinical ... Clinical DX: -
Causes of Peripheral Weakness without Sensory Changes - Differential Diagnosis Algorithm
No Objective Weakness
 • Cardio-pulmonary disease
of Peripheral Weakness ... No Objective Weakness ... Oculomotor • Myasthenia ... Lambert-Eaton Myasthenic ... #Peripheral #Weakness
Drugs associated with worsening of Myasthenia Gravis (MG):
•	D-penicillamine 
•	Botulinum toxin.
•	Telithromycin
•	Fluoroquinolones 
•	Quinine
•	Magnesium
•	Macrolide antibiotics 
•	Corticosteroids (may cause transient
with worsening of Myasthenia ... prevent prolonged myasthenic ... higher risk of myasthenic ... because of bulbar weakness
Myasthenia Gravis - Summary
 • an autoimmune disease of the postsynaptic neuromuscular junction associated with antibodies
Diagnosis: • Based on clinical ... or respiratory weakness ... mild to moderate weakness ... or generalized weakness ... - Improves clinical
Diagnosis of Myasthenia Gravis - Physical Exam Maneuvers
 • Sustained lateral gaze for seconds to elicit
Diagnosis of Myasthenia ... due to laryngeal weakness ... for neck flexor weakness ... fatigable limb weakness ... BrighamMedRes #Myasthenia
Generalized Weakness - Differential Diagnosis Framework
"l feel weak":
 • Infectious: Influenza, EBV, PNA, Bacteremia, Sepsis
 •
Generalized Weakness ... Rhabdomyolysis, Critical ... NMJ disorder (Myasthenia ... #Generalized #Weakness
Causes of Neuromuscular Weakness
 • Spinal Cord: Demyelinating Disease (MS), Epidural abscess, Infarction, Syringomyelia, Tetanus, Transverse
Neuromuscular Weakness ... heavy metals), Critical ... Eaton Syndrome, Myasthenia ... Neuromuscular #Weakness
Hypothyroidism – symptoms and signs.

Symptoms: 
Tiredness/malaise, 
Weight gain,
Anorexia,
Cold intolerance, 
Poor memory,
Change in appearance, 
Depression, 
Poor libido,
Myalgia, Muscle weakness ... Psychosis, Deafness ... of movement, Deafness ... #PhysicalExam #Endocrinology
Ocular Myasthenia Gravis on Physical Exam

A 41yo female was referred by her neurologist for double vision.
Ocular Myasthenia ... Her clinical exam ... non-localized EOM weakness ... Myasthenia gravis ... #PhysicalExam #clinical
Causes of Proximal Muscle Weakness That May Mimic Inflammatory Myopathy
 • Central or peripheral neurologic disease
Proximal Muscle Weakness ... neurologic disease • Myasthenia