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?
A
B
C
D
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.
Neuroanatomy, Head and Neck