A patient with myasthenia gravos may show a number of facial features.


Facial features may include:

(1) intermittent ptosis of one or both upper eyelids, which may be more apparent with upward gaze

(2) drooping jaw

(3) sneering or snarling smile (if the risorius and sygomatici muscles are affected)

(4) weakness of the facial muscles, which gets worse with repeated movement

(5) decreased articulation in speech with a nasal tone

(6) difficulty swallowing fluids with fluids regurgitating through the nose

(7) drooping of the head with advanced disease


Injection of an anticholinesterase drug will temporarily reverse the muscle weakness.


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