Mastication & Extraocular Muscles

Question 1

Medial Pterygoid

Answer 1

Medial surface of the lateral pterygoid plate and pterygoid fossa to medial surface of the ramus of mandible

Elevates mandible

Question 2

Lateral Pterygoid

Answer 2

Greater wing of the sphenoid (superior head) to TMJ capsule; lateral surface of pterygoid plate (inferior head) to the condylar process of the mandible

Laterally deviates, elevates and protrudes mandible

Question 3

Masseter

Answer 3

Zygomatic arch, anteriorly (superficial portion) and posteriorly (deep portion) to the ramus of the mandible

Elevates and protrudes mandible

Question 4

Temporalis

Answer 4

Temporal fossa to the coronoid process and ramus of mandible

Elevates and retracts mandible

Question 5

Superior Levator Palpebrae

Answer 5

Sphenoidal orbit to eyelid

Elevates and retracts eyelid

Question 6

Superior Rectus

Answer 6

Common tendinous ring to superior/anterior surface of sclera

Adducts, depresses and internally rotates eye

Question 7

Inferior Rectus

Answer 7

Common tendinous ring of inferior/anterior surface of sclera

Depresses and adducts eye

Question 8

Medial Rectus

Answer 8

Common tendinous ring to medial anterior surface of sclera

Adducts and moves eye medially

Question 9

Lateral Rectus

Answer 9

Common tendinous ring to lateral/anterior surface of sclera

Abducts eye laterally

Question 10

Superior Oblique

Answer 10

Common tendinous ring to superior/lateral sclera via a tendinous portion that passes through a fibrocartilaginous ring

Medially rotates eye

Question 11

Inferior Oblique

Answer 11

Maxillary orbit to inferior lateral sclera

Laterally rotates eye