16: Eye

Question 1

superior muscle to lateral rectus m.

Answer 1

levator palpebrae superioris - has both sympathetic and motor input - innervated by CN III - elevates eyelid

Question 2

iris

Answer 2

sphincter/dilator - contracts/opens the pupil

smooth muscle

Question 3

supratrochlear n.

Answer 3

sensory to eye
w/ supra-orbital to form frontal n.
branch of V1

Question 4

LR6 SO4….3

Answer 4

Lateral Rectus - innervated by CN 6 (abducens)
Superior Oblique - innervated by CN 4 (trochlear)
all the rest = CN 3 oculomotor

Question 5

preganglionic parasympathetic fibers also carried by

Answer 5

CN III to the ciliary ganglion

Question 6

postganglionic fibers carried by

Answer 6

short ciliary n. to ciliary body and sphinter pupillae m.

Question 7

annulus tendineus

Answer 7

a common tendineus ring where the superior, inferior, medial, and lateral recti muscles originate from

Question 8

pass through the annulus tendineus

Answer 8

CN II, III, VI and nasociliary n., opthalmic a.

Question 9

pass superior to annulus

Answer 9

CN IV, lacrimal and frontal n., superior opthalmic v.

Question 10

opthalmic arteries

Answer 10

branches of internal carotid a.

CSPLS (See’s, please!)

central retinal a.
supraorbital a.
posterior/anterior ethmoidal aa.
lacrimal a.
supratrochlear a.

Question 11

opthalmic veins

Answer 11

parallel the opthalmic arteries

drain as superior and inferior opthalmic v. into the cavernous sinus

Question 12

short ciliary nerves carry

Answer 12

post ganglionic parasympathetic
post ganglionic sympathetic
general sensory fibers