UII: CN V1 Flashcards
How does the ophthalmic division of CN V enter the orbit?
Superior orbital fissure
What other nerves are found in the superior orbital fissure with CN V1?
III IV VI
How is the ophthalmic division classified?
Sensory only
What sensory info does CN V1 carry?
Sensation from skin over nose, forehead, and scalp
From mucus membranes in frontal, sphenoid sinuses, and membrane covering nasal septum
What are the 4 branches of the ophthalmic division of CN V?
Meningeal nerve (tentorial branch)
Lacrimal nerve
Frontal nerve
Nasociliary nerve
Where is the meningeal nerve given off?
Before the ophthalmic division leaves the superior orbital fissure
What does the meningeal nerve supply?
Dura mater lining the middle cranial fossa
What is the smallest branch of the ophthalmic divison?
Lacrimal nerve
How does the lacrimal nerve travel?
Along the superior aspect of lateral rectus muscle
What does the lacrimal nerve pass through?
The lacrimal gland
What does the lacrimal nerve supply?
Lacrimal gland and reaches skin of the upper eyelid
What other info does the lacrimal nerve carry?
Some autonomic parasympathetic (secretory) fibers to lacrimal gland
Where do the autonomic parasympathetic fibers originate?
Pterygopalatine ganglion (CN VII)
How do the autonaumic parasympetic reach the lacrimal nerve?
Zygomatic nerve and zygomaticotemporal nerves (CN V2)
What is the largest motor branch of the ophthalmic division?
Frontal nerve
What are the two branches of the frontal nerve?
Supratrochlear nerve
Supraorbital nerve
What does the Supratrochlear nerve convey?
Sensation from the medial corner of the eye
What does supraorbital nerve carry?
Sensation from the conjunctiva, upper eyelid, and forehead and mucus membrane lining the frontal sinus
What is the structure of the nasociliary nerve?
Gives rise to 3 branches before the 2 terminal branches
What are the two terminal branches of the nasociliary nerve?
Anterior ethmoid nerve
Infratrochlear nerve
What are the three branches of the nasociliary nerve?
Communicating branch
Long ciliary nerve
Posterior ethmoid nerve
What does the communicating branch communicate with?
Ciliary ganglion
What does the long ciliary nerve supply?
Eyeball
What does the posterior ethmoid nerve carry?
Sensory info from the sphenoidal and ethmoidal sinus
What does the anterior ethmoid nerve supply?
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
What are the two branches of the anterior ethmoid nerve?
External nasal nerve
Internal nasal nerve
What does the Infratrochlear nerve supply?
Medial corner of the eye, including the lacrimal sac
What is the name of CN V1?
Ophthalmic division
