UII: CN V1

Question 1

How does the ophthalmic division of CN V enter the orbit?

Answer 1

Superior orbital fissure

Question 2

What other nerves are found in the superior orbital fissure with CN V1?

Answer 2

III IV VI

Question 3

How is the ophthalmic division classified?

Answer 3

Sensory only

Question 4

What sensory info does CN V1 carry?

Answer 4

Sensation from skin over nose, forehead, and scalp

From mucus membranes in frontal, sphenoid sinuses, and membrane covering nasal septum

Question 5

What are the 4 branches of the ophthalmic division of CN V?

Answer 5

Meningeal nerve (tentorial branch)
Lacrimal nerve
Frontal nerve
Nasociliary nerve

Question 6

Where is the meningeal nerve given off?

Answer 6

Before the ophthalmic division leaves the superior orbital fissure

Question 7

What does the meningeal nerve supply?

Answer 7

Dura mater lining the middle cranial fossa

Question 8

What is the smallest branch of the ophthalmic divison?

Answer 8

Lacrimal nerve

Question 9

How does the lacrimal nerve travel?

Answer 9

Along the superior aspect of lateral rectus muscle

Question 10

What does the lacrimal nerve pass through?

Answer 10

The lacrimal gland

Question 11

What does the lacrimal nerve supply?

Answer 11

Lacrimal gland and reaches skin of the upper eyelid

Question 12

What other info does the lacrimal nerve carry?

Answer 12

Some autonomic parasympathetic (secretory) fibers to lacrimal gland

Question 13

Where do the autonomic parasympathetic fibers originate?

Answer 13

Pterygopalatine ganglion (CN VII)

Question 14

How do the autonaumic parasympetic reach the lacrimal nerve?

Answer 14

Zygomatic nerve and zygomaticotemporal nerves (CN V2)

Question 15

What is the largest motor branch of the ophthalmic division?

Answer 15

Frontal nerve

Question 16

What are the two branches of the frontal nerve?

Answer 16

Supratrochlear nerve

Supraorbital nerve

Question 17

What does the Supratrochlear nerve convey?

Answer 17

Sensation from the medial corner of the eye

Question 18

What does supraorbital nerve carry?

Answer 18

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

Question 19

What is the structure of the nasociliary nerve?

Answer 19

Gives rise to 3 branches before the 2 terminal branches

Question 20

What are the two terminal branches of the nasociliary nerve?

Answer 20

Anterior ethmoid nerve

Infratrochlear nerve

Question 21

What are the three branches of the nasociliary nerve?

Answer 21

Communicating branch
Long ciliary nerve
Posterior ethmoid nerve

Question 22

What does the communicating branch communicate with?

Answer 22

Ciliary ganglion

Question 23

What does the long ciliary nerve supply?

Answer 23

Eyeball

Question 24

What does the posterior ethmoid nerve carry?

Answer 24

Sensory info from the sphenoidal and ethmoidal sinus

Question 25

What does the anterior ethmoid nerve supply?

Answer 25

Skin over the nose by way of the external nasal nerve

Mucus membrane covering the anterior part of the nasal septum via the internal nasal nerve

Question 26

What are the two branches of the anterior ethmoid nerve?

Answer 26

External nasal nerve

Internal nasal nerve

Question 27

What does the Infratrochlear nerve supply?

Answer 27

Medial corner of the eye, including the lacrimal sac

Question 28

What is the name of CN V1?

Answer 28

Ophthalmic division