Trigeminal Nerve - Ophthalmic Division Flashcards
The ophthalmic branch enters the orbit via the _____?
Superior orbital fissure
What other C.N. enter via the superior orbital fissure?
C.N. III, IV, VI
Is the ophthalmic motor or sensory?
Sensory ONLY
The ophthalmic carries sensation from skin over ____?
Nose, forehead, and scalp
The ophthalmic also carries sensation from mucous membranes in ______?
Frontal and sphenoid sinuses and membrane covering nasal septum.
The ophthalmic gives rise to four branches.
meningeal nerve/tentorial branch
lacrimal nerve
Frontal nerve
nasociliary nerve
When is the meningeal nerve/tentorial branch given off?
Before the ophthalmic division leaves the superior orbital fissure.
What does the tentorial branch/meningeal nerve supply ?
The dura mater lining the middle cranial fossa.
Which is the smallest of the three main branches of the ophthalmic division?
The lacrimal nerve.
How does the lacrimal nerve travel?
Travels along the superior aspect of the lateral rectum muscle.
The lacrimal nerves passes through what structure?
The lacrimal gland
What does the lacrimal nerve supply?
The lacrimal gland and the skin of the upper eyelid. Sensory!
What other fibers travel with the lacrimal nerve to the lacrimal gland?
postganglionic parasympathetic (secretory) fibers
These parasympathetic (secretory) fibers traveling with the lacrimal gland originated where?
The pterygopalatine ganglion (C.N.VII)
How do these parasympathetic (secretory) fibers reach the lacrimal nerve?
By way of the zygomatic nerve and zygomaticotemportal nerves (C.N. V2)
What is the largest major branch of the ophthalmic division?
The frontal nerve.
The frontal nerve divides into two branches.
The supratrochlear nerve and supraorbital nerve
The supratrochlear nerve conveys information form which area?
The medial corner of the eye.
The supraorbital nerve carries sensation from what areas? (4)
conjunctiva, upper eyelid, forehead, and mucus membrane lining the frontal sinus.
The nasociliary nerve gives rise to how many branches before diving into two terminal branches.
Three.
What are the three branches given off by the nasociliary nerve?
A communicating branch to the ciliary ganglion
Long culinary nerve
Posterior ethmoid nerve
The nasociliary divides into two terminal branches called what?
Anterior ethmoid nerve and
infratrochlear nerve
The long ciliary nerve supplies what?
They eyeball
The posterior ethmoid nerve carries sensation from what areas?
The sphenoidal and ethmoidal sinuses.
The anterior ethmoid nerve also divides into what to small divisions?
The external and internal nasal nerves.
The external nasal nerve off the anterior ethmoid nerve supplies what?
The skin over the nose
The internal nasal nerve (off of the anterior ethmoid) supplies what?
Mucus membrane covering the anterior part of the nasal septum.
The infratrochlear nerve supplies?
The medial corner of the eye, including the lacrimal sac.
