Mastication Muscles

Question 1

Masseter

Answer 1

Origin:
Zygomatic arch

Insertion:
Angle & ramus of mandible

Function:
Elevates mandible

Question 2

Temporalis

Answer 2

Origin:
Temporal fossa

Insertion:
Coronoid process of mandible

Function:
Elevates and retracts mandible

Question 3

Medial pterygoid

Answer 3

Origin:
Maxilla, Palantine bone, Medial surface of lateral pterygoid plate

Insertion:
Medial surface of mandible

Function:
Elevates mandible, Closes jaws

Question 4

Lateral pterygoid

Answer 4

Origin:
Greater wing & lateral pterygoid plate of sphenoid bone

Insertion:
Condyle of mandible, Articular disc of temporomandibular joint

Function:
Protracts mandible, Depresses mandible

Question 5

Origin:
Zygomatic arch

Insertion:
Angle & ramus of mandible

Function:
Elevates mandible

Answer 5

Masseter

Question 6

Origin:
Temporal fossa

Insertion:
Coronoid process of mandible

Function:
Elevates and retracts mandible

Answer 6

Temporalis

Question 7

Origin:
Maxilla, Palantine bone, Medial surface of lateral pterygoid plate

Insertion:
Medial surface of mandible

Function:
Elevates mandible, Closes jaws

Answer 7

Medial pterygoid

Question 8

Origin:
Greater wing & lateral pterygoid plate of sphenoid bone

Insertion:
Condyle of mandible, Articular disc of temporomandibular joint

Function:
Protracts mandible, Depresses mandible

Answer 8

Lateral pterygoid