Orbit C

Question 1

Ophthalmic division of Trigeminal N (CN V1) trifurcation into what 2 nerves?

Answer 1

Lacrimal
Frontal
Nasociliary

Question 2

Cell bodies of preganglionic neurons of CN III are located in the Oculomotor nucleus aka ___

Answer 2

Edinger-Westphal nucleus

Question 3

CN III preganglionic fibers (___) travel to ___ ganglion.

Answer 3

EW— Edinger-Westphal

Ciliary ganglion

Question 4

CN III postganglionic cell bodies are located in ___ ganglion

Answer 4

Ciliary ganglion

Question 5

Lesions of CN III sx:

Answer 5

Ophthalmoplegia—eyes down and out
Ptosis
Mydriasis

Question 6

Trochlear nerve arises from contralateral ___ nucleus and innervates superior ___ mm

Answer 6

Trochlear nucleus

Superior oblique mm

Question 7

Lesion of CN IV will have problems walking and ___, and will compensate by ___

Answer 7

Descending stairs

Tilting head

Question 8

Abducens N originates from ___ Pons and a lesion will produce medial ___.

Answer 8

Lower pons
Medial strabismus (cross eyes)

Question 9

3 divisions of CN V1:

Answer 9

Lacrimal
Frontal
Nasociliary

Question 10

Lacrimal N innervates lateral portion of eye lid and ___

Answer 10

Palpebral conjunctiva

Question 11

Largest branch of the ophthalmic nerve is?
Supraorbital branch is ___
Supratrochlear Branch is ___

Answer 11

Frontal nerve
Sensory branch
Sensory branch

Question 12

Sensory root of nasociliary n contributes to afferent limb of ___ reflex

Answer 12

Blink

Question 13

2 roots of nasociliary that contribute to afferent limb of blink reflex

Answer 13

Sensory root —ramus communicans

Long ciliary nerves

Question 14

Lacrimal gland is innervates by facial N (CN VII) via ___ ganglion —> maxillary N —> ___ nerve —> lacrimal gland

Answer 14

Pterygopalantine ganglion
(Branch of zygomatic N)
Lacrimal N

Question 15

Ophthalmic artery is a branch of ___

Answer 15

Internal carotid arther

Question 16

Superior ophthalmic veins receive from ___ of the eyeball

Answer 16

Vorticose veins

Question 17

Superior ophthalmic veins drains into ___

Answer 17

Cavernous sinus

Question 18

Inferior ophthalmic vein receives vorticose veins from eyeball, major truck drains into ___ sinus and lesser trunk exits via ___ to the pterygoid venous plexus

Answer 18

Cavernous

Inferior orbital fissure