Origins & Insertions MOM

Question 1

What is the origin of the superficial and deep head of the MASSETER?

Answer 1

Superficial - Maxillary process of zygomatic bone
Deep - Zygomatic arch of temporal bone

Question 2

What is the insertion of the MASSETER?

Answer 2

Ramus of mandible

Question 3

What is the origin of the TEMPORALIS?

Answer 3

Temporal fossa

Question 4

What is the insertion of the TEMPORALIS?

Answer 4

Coronoid process of mandible

Question 5

What is the origin of the MEDIAL PTERYGOID? (superficial and deep)

Answer 5

Superficial - maxillary tuberosity
Deep - medial aspect of lateral pterygoid plate of SPHENOID BONE

Question 6

What is the insertion of MEDIAL PTERYGOID?

Answer 6

Ramus of mandible

Question 7

What is the origin of the LATERAL PTERYGOID? (superior and inferior)

Answer 7

Superior - Greater wing of SPHENOID BONE
Inferior - Lateral pterygoid plate of SPHENOID BONE

Question 8

What is the insertion of LATERAL PTERYGOID?

Answer 8

Neck of mandible

Question 9

What is the action of the MASSETER?

Answer 9

Elevates mandible - closes mouth

Question 10

What is the action of the TEMPORALIS?

Answer 10

Elevates mandible - closes mouth. Also retracts mandible.

Question 11

What is the action of the MEDIAL PTERYGOID?

Answer 11

Elevates mandible - closes mouth

Question 12

What is the action of the LATERAL PTERYGOID?

Answer 12

Acting bilaterally - protract the mandible, pushing jaw forward and opens the mouth
Acting unilaterally - side-to-side movement of jaw.