Cranial Nerve Innervation Of Ocular Structures

Front 1

Function of (I) Olfactory Nerve

Back 1

Smell

Front 2

Function of (III) Oculomotor Nerve

Back 2

Eyelid and eyeball movement

Front 3

Function of (IV) Trochlear Nerve

Back 3

-Innervates superior oblique.
-Turns eye downward and laterally.

Front 4

Function of (V) Trigeminal Nerve

Back 4

-Chewing.
-Face & mouth touch & pain

Front 5

Function of (VI) Abducens

Back 5

Turns eye laterally

Front 6

Function of (VII) Facial

Back 6

-Controls most facial expressions.
-Secretion of tears & saliva
-Taste

Front 7

Function of (VIII) Vestibulocochlear Nerve

Back 7

-Hearing.
-Equilibrium sensation

Front 8

Function of (IX) Glossopharyngeal Nerve

Back 8

-Taste.
-Senses carotid blood pressure

Front 9

Function of (X) Vagus Nerve

Back 9

-Senses aortic blood pressure
-Slows heart rate
-Stimulates digestive organs
-Taste

Front 10

Function of (XI) Spinal Accessory Nerve

Back 10

-Controls trapezius & sternocleidomastoid
-Controls swallowing movements

Front 11

Function of (XII) Hypoglossal Nerve

Back 11

Controls tongue movements

Front 12

Sensory fibers from the structures of the medial canthal area (caruncle, canaliculi, lacrimal sac, medial aspect of eyelids, skin at the side of the nose) join to form what?

Back 12

Infra-trochlear nerve

Front 13

The infra-trochlear nerve penetrates the orbital septum, enters the orbit below the trochlea, and runs along the upper border of the medial rectus muscle, becoming what?

Back 13

Nasociliary nerve

Front 14

Sensory fibers from the skin along the center of the nose, the nasal mucose, and the ethmoid sinuses from what?

Back 14

Anterior ethmoid nerve

Front 15

Fibers from the ethmoid sinuses and the sphenoid sinus form what?

Back 15

Posterior ethmoid nerve

Front 16

Corneal nerves join nerves from the anterior segment to form what?

Back 16

Two long ciliary nerves

Front 17

The other branches of the long ciliary nerves that radiate from the cornea into the limbus join other sensory nerves from the anterior segment. They enter the choroid, join with the choroidal nerves, then course to the back of the eye and leave as 6-10 what?

Back 17

Short ciliary nerves

Front 18

The sensory fibers of short ciliary nerves do not synapse but pass through the ganglion, leaving as what?

Back 18

Sensory root of the ciliary ganglion

Front 19

CC: A slight variation can occur in the pathway of the long ciliary nerve in which the fibers loop into the sclera from the suprachoroidal space, forming a dome-shaped elevation about 2 mm from the limbus on either the nasal or temporal side. Can be blue or black and may be painful. What is it?

Back 19

(Scleral) Nerve Loops (of Axenfield)

Front 20

CC: Acute CNS infection caused by the varicella-zoster virus. Signs and symptoms include pain and rash in the distribution area supplied by the affected sensory nerves. What is it?

Back 20

Herpes Zoster (Shingles)

Front 21

Sensory fibers from the skin and muscles of the forehead and upper eyelid come together and form what?

Back 21

Supratrochlear nerve

Front 22

Sensory fibers from the skin and muscles of the forehead and upper eyelid form a 2nd nerve lateral to the supratrochlear nerve. What is this nerve?

Back 22

Supraorbital nerve