Eye

Question 1

Where do blow out fractures occur?

Answer 1

Maxillary bone

specifically the area where the nerve runs through

Question 2

Action and innervation of L. rectus

Answer 2

Abducts eye

CN VI

Question 3

Action and innervation of Inf rectus

Answer 3

Depress and adduct eye

CN III

Question 4

Action and innervation of S. rectus

Answer 4

Elevate and adduct eye

CN III

Question 5

Actionand innervation of Med. rectus

Answer 5

adduct eye

CN III

Question 6

Action and innervation of Sup. oblique

Answer 6

depress and abduct eye

CN IV

Question 7

Action and innervation of Inf. oblique

Answer 7

Elevate and abduct eye

CN III

Question 8

Action and innervation of Levator palpebrae

Answer 8

elevate upper lid

CN III

Question 9

What muscles would be used to move the eye straight up or straight down?

*Potential exam Q*

Answer 9

Moving the eye up: Sup. rectus, inf. oblique

Moving the eye down: Inf. rectus, Sup. oblique

Question 10

What travels through the sup orbital fissure?

Answer 10

• CN III
• CN IV
• CN V1 branches
  
  • Lacrimal N
  • Frontal N
    
    • Supraorbital
    • Supratroch.
  • Nasociliary N
    
    • Ciliary N
    • A+P Ethmoidal
• CN VI
• Ophthalmic vein

Question 11

What travels through the optic canal?

Answer 11

• CN II
• Opthalmic A.
  
  • Supraorbital A.
  • Supratroch. A
  • A+P ethmoidal aa
  • Central A of retina
  • Ciliary aa to sclera and choroid
  • lacrimal A.

Question 12

What drains into opthalmic vein?

Answer 12

Facial vein

Supraorbital vein

supratrochlear v

Question 13

Where does opthalmic vein drain into?

Answer 13

Cavernous sinus

Question 14

Branches of V1

Answer 14

Lacrimal N

Frontal N

               - Supraorbital N.
                   - Supratrochlear N.

Nasociliary N

       - Ciliary N.
                          - A+P ethmoidal NN

Question 15

Cranial parasympathetics travel with which CN after leaving pons?

Answer 15

III, IV, IX, X