Muscles Of Mastication

Question 1

What is the origin of Temporalis muscle? What is the insertion? What is the action?

Answer 1

Origin: temporal fossa.
Insertion: Coronoid process of the mandible.
Action: elevates the mandible.

Question 2

What is the origin of the Masseter muscle? What is the insertion? What is the action?

Answer 2

Origin / Zygotmatic arch
Insertion: lateral portion of the ramus of the mandible.
Action: elevates the mandible.

Question 3

What is the origin of the lateral pterygoid? What is the insertion? What is the action.

Answer 3

Origin :Sphenoid bone

Insertion: anterior side of consylar process of mandible.

Action: protracts the mandible can depress the mandible and move mandible side to side.

Question 4

What is the origin of the Medial Pterygoid? What is the insertion? What is the action?

Answer 4

Origin : Sphenoid bone
Insertion: medial aspect of the mandible
Action: elevates the mandible moves mandible side to side and can help protract the mandible.