Eye and Orbit

Question 1

what nerve gives sensory to skin over parotid duct

Answer 1

auriculotemporal of V3

Question 2

what nerve passes through foramen rotundum

Answer 2

V2

Question 3

what carries postgang psy fibers to parotid gland?

Answer 3

auriculotemporal of V3

Question 4

what innervates occipitalis m.?

Answer 4

posterior auricular branch of facial nerve (VII)

Question 5

which cranial nerves contain GVE fibers

Answer 5

III, VII, IX (otic ganglion) , X

Question 6

do we have drgs for cranial nerves?

Answer 6

no

Question 7

innervation path for parotid

Answer 7

CNIX exit jugular foramen, tympanic branch goes back up through the tympanic canaliculi to middle ear and form a plexus. part of those are sensory to the middle ear, but the ones we want go up through the roof of middle ear (tegman tympani) they cross the middle cranial fossa as the lesser petrosal nerve. it goes down through foramen ovale and synapse in otic ganglion

Question 8

what bone is the origin of the levator anguli oris

Answer 8

maxilla

Question 9

what bone contains stylomastoid f.

Answer 9

temporal

Question 10

which bone has the groove for lesser petrosal n.

Answer 10

temporal

Question 11

what CN that innervate the face contain SVE fibers

Answer 11

CN V3 (muscles of mastication. nerve of first pharyngial arch), VII (muscles of facial expression. nerve of second pharyngial arch)

Question 12

which blood vessel most often impinges on CN V to cause trigeminal neuralgia?

Answer 12

superior cerebellar a.

Question 13

are we gonna study visual pathways?

Answer 13

nope. just anatomy of the eye, no retina

Question 14

where do eye boogies get stuck?

Answer 14

medial angle of the eye in lacrimal caruncle and lacrimal lake. maybe semilunar conjunctival fold if its a big one .

Question 15

what bones are in the medial angle of the orbit?

Answer 15

lacrimal bone (with lacrimal groove), orbital plate of ethmoid bone, tiny piece of palatine bone, orbital surface of maxilla

Question 16

what nerves are intimately related to the orbit

Answer 16

V1, V2, III

Question 17

what bone parts make the superior orbital fissure?

Answer 17

greater and lesser wings of sphenoid

Question 18

what bone parts make the inferior orbital fissure?

Answer 18

greater wing of sphenoid and orbital surface of maxilla (which has a groove for V2)

Question 19

what sinus lies on either side of the body of sphenoid

Answer 19

cavernous sinus (for blood)

Question 20

what are some foramina that are totally within the sphenoid?

Answer 20

foramen rotundum, pterygoid canal, foramen ovale, foramen spinosum

Question 21

how does the central artery of retina get to the eye?

Answer 21

it travels WITHIN the optic nerve

Question 22

what does the tarsal plate do?

Answer 22

its like the skeleton of the upper and lower lid that attaches to the levator palpegrae superiorism,, superior tarsal m. (aka muellers muscle innervated by ANS)

Question 23

what innervates levator palpebrae superioris m

Answer 23

superior branch of occulomotor (III)

Question 24

what does the lacrimal gland wrap around?

Answer 24

tendon of levator palpebrae superioris

Question 25

what walls off the anterior portion of the orbit from the outside world?

Answer 25

orbital septum (from periosteum of the bone). its on inferior and superior portions of the orbit

Question 26

lacrimal nerve is from which cranial nerve

Answer 26

V1,

Question 27

what is the conjunctival fornix?

Answer 27

where the conjunctiva from the eyelid and eyeball meet

Question 28

how does a tear get to your nose?

Answer 28

punctiva to canaliculi

Question 29

PSy of CN __ innervate the lacrimal gland. How?

Answer 29

VII. go to internal acoustic meatus thru geniculate ganglion (NO SYNAPSE). thru foramen for greater petrosal nerve. it meets up with deep petrosal nerve (postganglionic sy) to pterygopalatine ganglion. SYNAPSE HERE. up to V2 to zygomatic n. to lacrimal n to lacrimal gland

Question 30

what are the three parts of the globe?

Answer 30

sclera, choroid, and neuronal layer (retina, which we don't care about yet)

Question 31

what muscle changes the shape of the lens?

Answer 31

ciliary muscle via zonular fibers. it attaches to the lens CAPSULE, not the actual lens

Question 32

what two things related to the eye are from the CNS?

Answer 32

retina (from optic cup) and optic nerve (from optic stalk)

Question 33

what germ layer makes the lens?

Answer 33

ectoderm

Question 34

what germ layer does the rest of the eyeball come from

Answer 34

mesoderm

Question 35

t/f sclera and cornea are the same layer

Answer 35

true

Question 36

what layer has the ciliary process and iris?

Answer 36

choroid layer

Question 37

what attaches the lens to the back of the eye?

Answer 37

hyaloid canal

Question 38

dialator muscle is psy or sy control?

Answer 38

sy.

Question 39

what does the fascia of ocular muscles attach to?

Answer 39

check ligaments go to the bone of orbit, otherwise they attach to the sclera

Question 40

what is the space between the fascia of ocular muscles and the fascial sheath of eyeball?

Answer 40

episcleral space

Question 41

____ mm. come from a common tendinous sheath behind the eye

Answer 41

rectus muscles

Question 42

what five nerves go through the common tendinous ring?

Answer 42

oculomotor sup. div. (III), nasociliary n, abducent (VI), oculomotor inf. div (III), optic nerve (II)

Question 43

when you have someone look at your finger, what nerves are you testing?

Answer 43

III, IV, VI

Question 44

what do short ciliary nerves do

Answer 44

go to the ciliary muscles

Question 45

what CN goes to lateral rectus?

Answer 45

abducens CN VI

Question 46

all the branches of V1 are ____

Answer 46

sensory

Question 47

nasociliary nerve is a branch of ___

Answer 47

opthalmic branch of V1

Question 48

trochlear nerve goes to ____

Answer 48

superior oblique m

Question 49

superior division of oculomotor innervates?

Answer 49

levator palpebrae superioris, superior rectus m

Question 50

what are post ganglionic sympatheic nerves going to do in the eye?

Answer 50

diallator pupillae, and intraocular blood vessels

Question 51

what are post synaptic parasympathetic fibers gonna do?

Answer 51

sphincter pupilllae

Question 52

short ciliary nerve contains what types of nerve fibers

Answer 52

postsynap. psymp, postsynap symp, and general sensory fibers

Question 53

arteries to eye are from?

Answer 53

opthalmic artery off the ICA

Question 54

veins from eye go?

Answer 54

to angular vein or to cavernous sinus or to pterygoid plexus. look at this picture because theres a lot

Question 55

infratrochlear n is the terminal branch of?

Answer 55

nasociliary n.

Question 56

external nasal n is terminal branch of?

Answer 56

anterior ethmoidal n.

Question 57

horners syndrom is?

Answer 57

ptosis of muellers muscle

Question 58

if you shine a light in the eye and neither eye responds, what is the problem?

Answer 58

the afferents are not getting the signal back

Question 59

ciliary ganglion lies on the __ side of the optic nerve

Answer 59

lateral

Question 60

if you get a baseball to the eye, what kind of fracture can you get?

Answer 60

blowout fracture

Question 61

do you replace a lens for glaucoma?

Answer 61

uhh. NO.

Question 62

when would one get conjunctival petichiae?

Answer 62

strangulation