Rigidity of facial muscles Risus sardonicus is associated with______________?
Correct answer: B. Tetanus
- A. Tetany
- B. Tetanus
- C. Leprosy
- D. Actinomycosis
Explanation
Risus sardonicus is the fixed, grimacing facial expression caused by spasms of facial muscles in tetanus. It results from neurotoxin-mediated muscle rigidity, not from the neuromuscular changes of tetany.
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