Muscles of Mastication and Facial Expression

Question 1

Buccinator

Answer 1

Compresses the cheeks and holds food in contact with the teeth

Question 2

External (Lateral) pterygoid

Answer 2

Depresses, protrudes, and moves the mandible from side to side

Question 3

Internal (medial) pterygoid

Answer 3

Closes and aids in sideways movement

Question 4

Masseter

Answer 4

Raises the mandible, closes the jaws, and occludes the teeth

Question 5

Mentalis

Answer 5

Raises and wrinkles the skin of the chin and pushes up the lower lip

Question 6

Orbicularis oris

Answer 6

Closes and puckers the lips and aids in chewing by pushing the food against the teeth

Question 7

Temporal

Answer 7

Raises the mandible, closes the jaw, and occludes the teeth

Question 8

Zygomatic Major

Answer 8

Draws the angles of the mouth upward and backward, as in laughing