Cranial Nerve Flashcards
What’s the function of optical nerve?
Sends the message from the back of the eye to the brain
What’s the name of the third nerve?
Oculomotor
How many divisions oculomotor have?
Two, superior division and inferior division
What is the function of the superior division?
The top eye lid mover muscle & the eye ball up mover
(Levator palpebrae superioris)
Superior rectus (SR)
What’s the function of Inferior division?
Moves medial rectus(MR)
Inferior rectus (IR)
Inferior oblique ( IO)
Pupil construction and
Accommodations
What’s the function of Cranial nerve CN IV Trochlear?
Innervates superior oblique muscle (SO)
Abducts, depresses and internally rotates the eye.
How many divisions have the Trigeminal nerve?
Three divisions
What are the three divisions of trigeminal nerve?
Frontal nerve
Nasociliary nerve
Lacrimal nerve
What is the fifth CN V- cranial nerve name
Trigeminal nerve
Where does the frontal nerve go?
Innervates the forehead, upper eyelids, and sides of nose
What does the nasociliary nerve Innervates?
Cornea, iris, and ciliary body
What does lacrimal nerve Innervates?
Lacrimal glands, skin of the upper eyelids and conjunctiva
What’s the other motor function of trigeminal nerve?
Opens and closes the jaw & facial sensations
What’s the Cranial nerve six CN VI ?
Abducens nerve
Abducens nerve Innervates/ function
Lateral rectus muscle(LR)
Lateral movement of the eyeball, specifically abduction
What’s the function of lacrimal and salivary glands?
Expression parasympathetic innervation of lacrimal and salivary glands.
All the muscles of the eye comes from cranial CN III except for two,
SO4 and LR6
True/ False
The ophthalmic artery passes into the orbit through optic canal where it travels with the optic nerve
True
T/F
Arteries always take blood away from the heart and bring blood to the eye.
True
Veins take the blood away from the eye and to the heart.
True
What are the three layers of tear?
Lipid
Aqueous
Mucin
What is the function of tear?
To
Protects, lubricates, immunity, and optics
