Mechanics of Deglutition and Phonation

Question 1

Name the one muscle of the tongue that is not motorly innervated by the hypoglossal (12th) CN. What’s its innervation?

Answer 1

Palatoglossus (X innervation)

Question 2

Which muscle is not innervated by X in the pharynx?

Answer 2

Stylopharyngeus (IX)

Question 3

2 muscles important for lifting jaw during mastication

Answer 3

Temporalis and masseters

Question 4

What muscle protrudes mandible?

Answer 4

Lateral pterygoids (medial pterygoids bring it back)

Question 5

What muscle helps maintain food over teeth for grinding?

Answer 5

Buccinator muscle (maintains facial tone)