Cranial Nerve 3.

Question 1

What is the name for cranial nerve 3?

Answer 1

Oculomotor

Question 2

Is Cranial nerve 3 sensory, motor, or mixed?

Answer 2

Motor

Question 3

What are the 2 extra ocular that C.N.3 does not supply?

Answer 3

Lateral Rectus

Superior Obloque

Question 4

What is the C.N. that supplies the lateral rectus?

Answer 4

6

Abducens

Question 5

What is the Cranial Nerve that supplies the Superior Oblique

Answer 5

4

Trochlea

Question 6

What types of fibers does C.N.3 carry?

Answer 6

Somatic and parasympathetic

Question 7

What does C.N.3 have: nuclei of origin, nuclei of termination, or both?

Answer 7

Nuclei of origin

Motor

Question 8

What is the name of the somatic nuclei of origin?

Answer 8

Oculomotor nuclei

Question 9

Where is the somatic nuclei of origin located?

Answer 9

In periaquductal gray matter
Anterior to cerebral aqueduct
At the level of superior colluculi

Question 10

What part of the cerebral cortex sends axons TO the somati nuclei of origin?

Answer 10

BRDMN Area 8

Question 11

Besides the cerebral cortex what else sends fibers to the somatic nuclei of origin?

Answer 11

1. Sup. Colliculus

2. Medial longitudinal fascicles

Question 12

Axons sent from the oculomotor nuclei travel anteriorly toward what structure?

Answer 12

Red nucleus

Question 13

Oculomotor nuclei fibers exit the CNS in what structure?

Answer 13

Interpeduncular fossa

Question 14

What the nerve leaves the CNS what is it covered by?

Answer 14

Epineurium

Question 15

When the nerve leaves the CNS thru the fossa where do they travel to next?

Answer 15

1. penetrate the dura mater
2. travel along the cavernous sinus
3. exit the skull thru Sup. Orbital fissure

Question 16

When the nerve enter the eye socket what happens to it?

Answer 16

Splits into

1. Superior Rami
2. Inferior Rami

Question 17

What are the muscles supplied by the Sup. Ramus

Answer 17

1. Inf. Aspect of the Sup. Rectus

2. Levator Palpebrae Superioris

Question 18

What the divisions of the inferior ramus and what does that division supply?

Answer 18

Medial: Medial Rectus
Central: Inferior rectus
Lateral: Inferior Oblique

Question 19

What is the nucleus that contains preganglionic Parasympathetic fibers?

Answer 19

Acssessory oculomotor nucleus

Question 20

Axons from the accessory oculomotor nucleus follow oculomotor nerve and synapse where?

Answer 20

Ciliary ganglion

Question 21

True or False

The ciliary ganglion is located anterior to the eyeball

Answer 21

False
Posterior
Silly how can something be anterior to your eyeball…it would look really weird🤣

Question 22

Where is the ciliary ganglion located?

Answer 22

Posterior to eyeball about 1cm ant. to the superior original fissure

Question 23

Postganglionic Parasympathetic axons follows what structures?

Answer 23

Ciliary arteries

Question 24

What is the pathway for Postganglionic Parasympathetic fibers?

Answer 24

Follow ciliary arteries, pierce sclera, and travel along internal surface of sclera

Question 25

What do the Postganglionic Parasympathetic fibers supply?

Answer 25

1. Ciliaris

2. pupillary constricted/sphincter pupilae

Question 26

What is the job of the ciliaris?

Answer 26

To make the lens more complex

Question 27

True or False

Nerves leaving the ciliary ganglion also carry sympathetic and somatic sensory fibers

Answer 27

True

Question 28

Sympathetic and somatic sensory fibers from ciliary ganglion are picked up by what nerve?

Answer 28

Ophthalmic nerve (V1)

Question 29

True or a False

Sympathetic and somatic sensory fibers synapse with the ciliary ganglion

Answer 29

False

Pass thru Ciliary ganglion WITHOUT synapsing