66-year-old woman is unable to open her mouth or jaw because of tetanus resulting from a penetrating wound from a rusty nail. Which of the following muscles would most likely be paralyzed?
Correct Answer: B
Description: Lateral pterygoid muscle opens the mouth by depressing the jaw. Masseter, medial pterygoid, and temporalis muscles close the jaw. Buccinator muscle is a muscle of facial expression.
Category:
Anatomy
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