Facial muscles

Question 1

What are the muscles that are involved with the movement of the jaw?

Answer 1

1) Masseter
2) Temporalis

3) Pterygoid muscles
- Medial

• Lateral

Question 2

Where is the Masseter muscle located? (from–>to)

Answer 2

From the cheekbone to the ramus of the mandible

Question 3

Where is the Temporalis muscle located? (from–>to)

Answer 3

Over temporalis bone - converges into a tendon that inserts onto the coronoid process of the mandible

Question 4

Where are the Pterygoid muscle located? (from–>to)

Answer 4

Underneath the zygomatic arch

Medial:
- Deep to the lateral muscle

• From the Pterygoid plate to the mandibular angle
• Quadrangular in shape

Lateral:
- Superficial to the medial Pterygoid muscle

• From the Pterygoid plate to the neck of the mandible
• Triangular in shape

Question 5

How are the Pterygoid muscles best seen and why?

Answer 5

From the inside of the skull - very deep muscles underneath the zygomatic arch

Question 6

What is the function of the masseter muscle?

Answer 6

Close the mouth (elevate the jaw)

Question 7

What is the function of the

temporalis muscle?

Answer 7

Bilaterally - Retract the jaw
Close the mouth (elevate the jaw)

Unilaterally - Helps to move the jaw side-side

Question 8

What is the function of the medial pterygoid muscle?

Answer 8

Close the mouth (elevate the jaw)

Question 9

What is the function of the lateral pterygoid muscle?

Answer 9

Bilaterally - protract the mandible

Unilaterally - Move jaw side to side

Question 10

What are the muscles involved in facial expression?

CHECK SPELLING

Answer 10

1) Buccinator
2) Orbicularis Oris
3) Orbucularis Occuli
4) Mentalis
5) Zygomatic major
6) Zygomatic minor
7) Nasalis
8) Risorius
9) Depressor anguli oris
10) Levator anguli oris
11) Depressor labii inferioris
12) Levator labii superirolis
13) Leavtor labii superiolis alaque nasii
14) Procerus
15) Corrugator supercilli