Muscles Of Mastication

Question 1

Temporalis

Answer 1

Origin: entire temporal fascia and fossa
Insertion: Anterior border, apex, posterior border, and internal surface of coronoid process of the mandible and anterior border of the ramus of the mandible
Action: Elevates the mandible at the TMJ, retracts mandible

Question 2

Masseter Superficial Layer

Answer 2

O: Inferior margins of the zygomatic arch
I: Superficial Layer: Angle and inferior 1/2 of external surface of the ramus of mandible

Question 3

Masseter Deep Layer

Answer 3

O: Inferior margin and deep surface of the zygomatic bone
I: External surface of coronoid process of mandible and Superior 1/2 external surface of the Ramus of the mandible

Question 4

What is the action for the masseter?

Answer 4

Elevate the mandible and assist the protract the mandible at the TMJ

Question 5

What’s the action of the Medial Pterygoid?

Answer 5

Elevates, protracts and contralaterally deviates the mandible at TMJ

Question 6

What’s the origin for the Medial Pterygoid Deep head?

Answer 6

Medial surface of the lateral pterygoid plate of the Pterygoid process of the sphenoid, the Palatine bone, and the tuberosity of the maxilla

Question 7

What is the insertion for the Medial Pterygoid?

Answer 7

Internal surface of the angle and inferior border of the mandible

Question 8

Where is The Superficial head for the Medial Pterygoid muscle located?

Answer 8

Palatine bone and the maxilla

Question 9

What muscle inserts into the articular disc and capsule of temporomandibular joint, and neck of the mandible, allowing it to protract and contralaterally deviate the mandible at the TMJ?

Answer 9

Lateral Pterygoid Muscle

Question 10

What’s the origin for the superior head of the lateral pterygoid muscle?

Answer 10

Greater wing of the sphenoid bone

Question 11

What muscle’s inferior head originates from the lateral surface on the lateral pterygoid plate of the Pterygoid process of the sphenoid?

Answer 11

Lateral Pterygoid Muscle