Eye Mm, Nn, Aa, Vv.

Question 1

what is elevation of the eyeball?

Answer 1

moving pupil superiorly

Question 2

what is depression of the eyeball?

Answer 2

moving pupil inferiorly

Question 3

what is abduction of the eyeball?

Answer 3

moving pupil laterally

Question 4

what is adduction of the eyeball?

Answer 4

moving pupil medially

Question 5

what is internal rotation (intorsion) of the eyeball?

Answer 5

rotating upper part of pupil medially (toward nose)

Question 6

what is external rotation (extorsion) of the eyeball?

Answer 6

rotating upper part of pupil laterally (toward temple)

Question 7

name the extraocular muscles

Answer 7

• levator palpebrae superioris
• superior rectus
• inferior rectus
• medial rectus
• lateral rectus
• superior oblique
• inferior oblique

Question 8

levator palpebrae superioris receives ____ innervation

Answer 8

sympathetic

Question 9

origin & insertion of levator palpebrae superioris

Answer 9

O: lesser wing of sphenoid bone, superior & anterior to optic canal

I: superior tarsus & skin of superior eyelid

Question 10

innervation of levator palpebrae superioris

Answer 10

CN III: occulomotor

Question 11

what are the primary movers and stabilizers for elevation of the eyeball?

Answer 11

primary: sup rectus
stabilizer: inf oblique

Question 12

how would superior rectus be tested?

Answer 12

look laterally & upward

Question 13

what are the primary movers and stabilizers for depression of the eyeball?

Answer 13

primary: inf rectus
stabilizer: sup oblique

Question 14

what are the primary movers and stabilizers for adduction of the eyeball?

Answer 14

primary: med rectus
stabilizer: sup & inf rectus

Question 15

what are the primary movers and stabilizers for abduction of the eyeball?

Answer 15

primary: lat rectus
stabilizer: inf & sup oblique

Question 16

what are the primary movers and stabilizers for internal rotation of the eyeball?

Answer 16

primary: sup oblique
stabilizer: sup rectus

Question 17

what are the primary movers and stabilizers for external rotation of the eyeball?

Answer 17

primary: inf oblique
stabilizer: inf rectus

Question 18

how would inferior rectus be tested?

Answer 18

look laterally & downward

Question 19

how would lateral rectus be tested?

Answer 19

look laterally

Question 20

how would medial rectus be tested?

Answer 20

look medially

Question 21

how would inferior oblique be tested?

Answer 21

look medially & upward

Question 22

how would superior oblique be tested?

Answer 22

look medially & downward

Question 23

origin & insertion of superior oblique

Answer 23

O: body of sphenoid bone
I: tendon passes through fibrous ring (trochlea), changes direction & inserts into sclera deep to sup rectus

Question 24

innervation of superior oblique

Answer 24

CN IV: Trochlear

Question 25

origin & insertion of inferior oblique

Answer 25

O: ant part of floor of orbit I: sclera deep to lateral rectus

Question 26

origin & insertion of superior, inferior, medial & lateral rectus

Answer 26

O: common tendinous ring I: sclera just posterior to corneoscleral junction

Question 27

what extraocular muscles are innervated by CN III: oculomotor?

Answer 27

- levator palpebrae superioris - IO - SR - IR - MR

Question 28

innervation of lateral rectus

Answer 28

CN VI: abducent

Question 29

the optic nerve exits the skull through the ____

Answer 29

optic canal

Question 30

what is innervated by the superior division of the oculomotor nerve?

Answer 30

levator palpebrae superioris & superior rectus

Question 31

what is innervated by the inferior division of the oculomotor nerve?

Answer 31

medial rectus inferior rectus inferior oblique

Question 32

CN III carries preganglionic ____ fibers to the ____ ganglion

Answer 32

parasympathetic ciliary

Question 33

the oculomotor nerve exits the skull through the ____

Answer 33

superior orbital fissure

Question 34

the trochlear nerve exits the skull through the ____

Answer 34

superior orbital fissure

Question 35

the abducent nerve exits the skull through the ____

Answer 35

superior orbital fissure

Question 36

the ophthalmic nerve (V1) exits the skull through the ____

Answer 36

superior orbital fissure

Question 37

name the 3 branches of the ophthalmic nerve (V1)

Answer 37

frontal n nasociliary n lacrimal n

Question 38

describe the location of the ciliary ganglion

Answer 38

between optic n & lateral rectus

Question 39

what fibers are carried by the short ciliary nerves?

Answer 39

- sensory branches of V1 (nasociliary n) - postgang. PSNS & SNS to ciliary body & sphincter pupillae

Question 40

the nasociliary nerve is found in the orbit associated with which artery?

Answer 40

opthalmic a

Question 41

____ ciliary nerves do NOT go through the ciliary ganglion

Answer 41

long

Question 42

what fibers are carried by the long ciliary nerves?

Answer 42

- sensory branches of V1 - postgang. SNS to dilator pupillae

Question 43

the ophthalmic artery is a branch of the ____

Answer 43

internal carotid a

Question 44

name the branches of the ophthalmic artery

Answer 44

- central a of retina - lacrimal

Question 45

the infra-orbital artery is a branch of the ____

Answer 45

maxillary a

Question 46

the superior and inferior ophthalmic veins drain into the ____

Answer 46

cavernous sinus

Question 47

a 16-year-old girl experiences ptosis and miosis in her right eye after resection of a lymphangioma from the apex of her right lung. what structures were damaged during the surgery to cause these symptoms?

Answer 47

CN III: oculomotor