Facial Muscles OIA

Question 1

Buccinator

Answer 1

• Origin: maxilla and mandible
• Insertion: N/A
• Action: compress cheek

Question 2

Levator labii superioris

Answer 2

• Origin: zygomatic bone
• Insertion: skin of upper lip
• Action: elevate upper lip

Question 3

Mentalis

Answer 3

• Origin: mandible
• Insertion: skin of chin
• Action: pout

Question 4

Orbicularis oris

Answer 4

• Origin: maxilla and mandible
• Insertion: skin around mouth
• Action: close lips

Question 5

Orbicularis oculi

Answer 5

• Origin: frontal and maxillary bones
• Insertion: eyelids
• Action: close eyelids

Question 6

Risorius

Answer 6

• Origin: parotid salivary glands
• Insertion: angle of mouth
• Action: pulls mouth laterally

Question 7

Zygomaticus (Major & Minor)

Answer 7

• Origin: Zygomatic bone
• Insertion: angle of mouth
• Action: Smile

Question 8

Corrugator supercilii

Answer 8

• Origin: frontal bone
• Insertion: eyebrow
• Action: eyebrow toward midline

Question 9

Platysma

Answer 9

• Origin: fascia of Chest
• Insertion: mandible
• Action: depress mandible; tense neck

Question 10

Levator anguli oris (caninus)

Answer 10

• Origin: maxilla
• Insertion: angle of mouth
• Action: smile