O & I of Muscles

Question 1

Origin of Temporalis

Answer 1

• Temporal Fossa

- Temporal Fascia

Question 2

Insertion of Temporalis

Answer 2

• Coronoid process of mandible

- Ramus of mandible (anterior border and temporal crest)

Question 3

Origin of Masseter

Answer 3

Zygomatic Arch’s inferior and medial part

Question 4

Insertion of Masseter

Answer 4

• Ramus and angle of the mandible (lateral surface)

- Mandibular coronoid process

Question 5

Origin of Lateral Pterygoid

Answer 5

-Superior head:
Greater Wing of Sphenoid (infratemporal surface)
-Inferior head:
Lateral Pterygoid Plate (lateral surface)

Question 6

Insertion of Lateral Pterygoid

Answer 6

• Condylar neck
• TMJ capsule
• Articular disk of TMJ

Question 7

Origin of Medial Pterygoid

Answer 7

-Deep head:
Lateral Pterygoid Plate
(medial surface) & palatine bone (pyramidal process)
-Superficial head:
Maxilla’s tuberosity & palatine bone (pyramidal process)

Question 8

Insertion of Medial Pterygoid

Answer 8

Ramus of mandible (medial surface)