Trigeminal Nerve - Ophthalmic Division

Question 1

The ophthalmic branch enters the orbit via the _____?

Answer 1

Superior orbital fissure

Question 2

What other C.N. enter via the superior orbital fissure?

Answer 2

C.N. III, IV, VI

Question 3

Is the ophthalmic motor or sensory?

Answer 3

Sensory ONLY

Question 4

The ophthalmic carries sensation from skin over ____?

Answer 4

Nose, forehead, and scalp

Question 5

The ophthalmic also carries sensation from mucous membranes in ______?

Answer 5

Frontal and sphenoid sinuses and membrane covering nasal septum.

Question 6

The ophthalmic gives rise to four branches.

Answer 6

meningeal nerve/tentorial branch
lacrimal nerve
Frontal nerve
nasociliary nerve

Question 7

When is the meningeal nerve/tentorial branch given off?

Answer 7

Before the ophthalmic division leaves the superior orbital fissure.

Question 8

What does the tentorial branch/meningeal nerve supply ?

Answer 8

The dura mater lining the middle cranial fossa.

Question 9

Which is the smallest of the three main branches of the ophthalmic division?

Answer 9

The lacrimal nerve.

Question 10

How does the lacrimal nerve travel?

Answer 10

Travels along the superior aspect of the lateral rectum muscle.

Question 11

The lacrimal nerves passes through what structure?

Answer 11

The lacrimal gland

Question 12

What does the lacrimal nerve supply?

Answer 12

The lacrimal gland and the skin of the upper eyelid. Sensory!

Question 13

What other fibers travel with the lacrimal nerve to the lacrimal gland?

Answer 13

postganglionic parasympathetic (secretory) fibers

Question 14

These parasympathetic (secretory) fibers traveling with the lacrimal gland originated where?

Answer 14

The pterygopalatine ganglion (C.N.VII)

Question 15

How do these parasympathetic (secretory) fibers reach the lacrimal nerve?

Answer 15

By way of the zygomatic nerve and zygomaticotemportal nerves (C.N. V2)

Question 16

What is the largest major branch of the ophthalmic division?

Answer 16

The frontal nerve.

Question 17

The frontal nerve divides into two branches.

Answer 17

The supratrochlear nerve and supraorbital nerve

Question 18

The supratrochlear nerve conveys information form which area?

Answer 18

The medial corner of the eye.

Question 19

The supraorbital nerve carries sensation from what areas? (4)

Answer 19

conjunctiva, upper eyelid, forehead, and mucus membrane lining the frontal sinus.

Question 20

The nasociliary nerve gives rise to how many branches before diving into two terminal branches.

Answer 20

Three.

Question 21

What are the three branches given off by the nasociliary nerve?

Answer 21

A communicating branch to the ciliary ganglion
Long culinary nerve
Posterior ethmoid nerve

Question 22

The nasociliary divides into two terminal branches called what?

Answer 22

Anterior ethmoid nerve and

infratrochlear nerve

Question 23

The long ciliary nerve supplies what?

Answer 23

They eyeball

Question 24

The posterior ethmoid nerve carries sensation from what areas?

Answer 24

The sphenoidal and ethmoidal sinuses.

Question 25

The anterior ethmoid nerve also divides into what to small divisions?

Answer 25

The external and internal nasal nerves.

Question 26

The external nasal nerve off the anterior ethmoid nerve supplies what?

Answer 26

The skin over the nose

Question 27

The internal nasal nerve (off of the anterior ethmoid) supplies what?

Answer 27

Mucus membrane covering the anterior part of the nasal septum.

Question 28

The infratrochlear nerve supplies?

Answer 28

The medial corner of the eye, including the lacrimal sac.