Eye and Eye Movements

Question 1

Levator Palpebrae Superioris Muscle

Innervation, Action

Answer 1

Oculomotor N CN III

Opens eye

Question 2

Superior Oblique Muscle

Innervation, Action

Answer 2

Trochlear N CN IV

Depress, Abduct and Medially Rotate eye

Question 3

Inferior Oblique Muscle

Innervation, Action

Answer 3

Oculomotor N CN III

Elevate, Abduct and Laterally Rotate eye

Question 4

Superior Rectus Muscle

Innervation, Action

Answer 4

Oculomotor N CN III

Elevate, Adduct and Medially Rotate eye

Question 5

Inferior Rectus Muscle

Innervation, Action

Answer 5

Oculomotor N CN III

Depress, Adduct and Laterally Rotate eye

Question 6

Medial Rectus Muscle

Innervation, Action

Answer 6

Oculomotor N CN III

Adducts eye

Question 7

Lateral Rectus Muscle

Innervation, Action

Answer 7

Abducent N CN VI

Abducts eye

Question 8

Opthalmic Artery

Branches and Anastomoses

Answer 8

Lacrimal A anastomosis with Middle Meningeal A

Supraorbital A anastomosis with Superior Temporal A

Supratrochlear A anastomosis with Angular A

Ethmoid A anastomosis with Sphenopalatine A

Question 9

Retina Blood Supply

Answer 9

Central Retinal A (sits in Optic N)

No anastomoses but can form one if occlusion develops slowly

Question 10

Iris Innervation

Answer 10

Long Ciliary Nerves (sympathetic)