Cranial Nerves AP1

Question 1

Trochlear

Answer 1

CN IV
Innervates superior Oblique

ONLY CRANIAL NERVE TO ARRISE FROM THE POSTERIOR ASPECT OF BRAIN STEM

Function; Eye movement

Question 2

Vestibulocochlear

Answer 2

CN VIII
Mainly sensory
Vestíbulo branch: Equilibrium
Cochlear Branch: Hearing

Question 3

Which two CN contain only sensory

Answer 3

CN I and CN II

Olfactory and Optic

Question 4

Trigemenal

Answer 4

Largest CN
Emerges from the PONS
Sensory to face, head, and anterior 2/3 tongue

Function: mastication, facial sensation
Has two roots

Question 5

Which Cranial Nerve is so predominately sensory that its motor function is often over looked

Answer 5

CN VIII

vestibulocochlear

Question 6

Hypoglossal

Answer 6

CN XII
Mixed
All intrinsic muscles of the tongue and extrinsic muscles of the tongue except for the palatoglossus

Function: tongue movement

Question 7

Which CN are commonly referred to as the Motor CN

Answer 7

CN III (oculomotor) 
CN IV (Troclear)
CN VI (Abducens) 
CN XI (Spinal Accesory)
CN XII (Hypoglossal)

Question 8

Glossopharyngeal

Answer 8

CN XI 
Mixed 
Sensory Axons to posterior 1/3 of tongue 
-Taste
-tactile sensation 
-baraoreceptors in carotid sinus 
_Chemoreceptors in carotid bodies 

Parasympathetic Motor axons: Parotid Gland

Function: Taste, salivation, innervation of the pharynx

Question 9

Abducens

Answer 9

CN VI
Mainly Motor
Lateral Rectus Muscle of the EyE
FUNCTION.; Eye movement

Question 10

Flow of info for optic nerve

Answer 10

Rods and cons
Bipolar cells 
Ganglion cells 
Optic nerve 
Optic tract 
Optic chiasma

Question 11

What type of receptors are olfactory receptors

Answer 11

Bipolar neurons that pass through the cribs form plate of the ethmoid

Question 12

Olfactory

Answer 12

CN I
Entirely sensory
Function: Smell

Question 13

Accessory

Answer 13

CN XI
MIXED
Originates from both the brain stem and the spinal cord
ONLY CN to have a spinal component

Function: Pharynx, NEck and shoulder movement

Question 14

Which cranial nerves are called sensory nerves

Answer 14

CN I
CN II
And CN VIII ( even tho CN VIII is mixed)

Question 15

Facial

Answer 15

CN VII
Mixed
Somatic motor nuerons: facial expression, styophoid, sat-edits muscles, posterior gastric belly

Parasympathetic axons : lacrimal glands, nasal glands, saliva, and sublingual glands

Sensory: anterior 2/3 of taste buds

Function: facial expression, taste, salivation, lacrimation

Question 16

What are the5 branches of the facial nerve

Answer 16

Temporal, 
Zygomatic 
Bucal
Mandibular 
Cervical

Question 17

What are the roots of CN V

Answer 17

Smaller root supplying mastication

Larger root is in three sections

• opthalmalic V1
• maxillary V2
• mandibular V3

(Dermatones)

Question 18

Optic

Answer 18

CN II
Mylienated axons for vision
Function: Vision

Question 19

What are the two classifications of CN

Answer 19

Sensory or Mixed (Senosory and Motor)

Question 20

Oculomotor

Answer 20

CN III
Inerrvates extrinsic eye muscles
Parasympatheticly innervated intrinsic muscles
Innervates the Levator Palperbrae

Function; Eye movement

Question 21

Where would local antesthetic be applied by dentists

Answer 21

Maxillary Nerve 
CN V(5) V2

Question 22

Vagus

Answer 22

CN X
LONGEST CRANIAL NERVE

Function: swallowing, talking, Cardiac, GI Tract, respiration, taste