The Cranial Nerves 1,2

Question 1

Cranial Nerve I
Name
Function
Location of nuclei
Exit

Answer 1

Name: Olfactory nerve
Function: Sensory: Sense of smell
Location of nuclei: Above the midbrain, base of frontal
Exit: Foraminae of Cribiform plate

Question 2

Cranial Nerve II
Name
Function
Location of nuclei
Exit

Answer 2

Name: Optic nerve
Function: Sensory: Sight
Location of nuclei: Above midbrain,
Exit: Optic Canal

Question 3

Cranial Nerve III
Name
Function
Location of nuclei
Exit

Answer 3

Name: Oculomotor
Function: Motor: Somatic, Visceral
Location: Midbrain
Exit: Cavernous sinus, superior orbital fissure, located between greater/lesser sphenoid

Question 4

What is the function of Cranial Nerve III

Answer 4

4/6 extraocular muscles, also ELEVATES eyelid, levator palpebrae superioris.
Pupillary light reflex: mid brain function, motor outputs to Sphincter pupillae muscle in iris.

Question 5

Cranial Nerve IV
Name
Function
Location of nuclei
Exit

Answer 5

Name: Trochlear
Function: Motor: single eye muscle
Location: midbrain
Exit: Cavernous sinus/ Superior orbital fissure

Question 6

Cranial Nerve V
Name
Function
Location of nuclei
Exit

Answer 6

Name: Trigeminal
Function: Mixed: Somatic/Branchial
Location: Occupies the whole brain stem
Exit: V1 superior orbital fissure, V2 foramen rotundum, V3 Foramen ovale

Question 7

What are the 3 branches of Cranial Nerve V

Answer 7

Trigeminal Nerve branches into Opthlamic, maxillary and mandibular

Question 8

Cranial Nerve VI
Name
Function
Location of nuclei
Exit

Answer 8

Name: Abducens
Function: Motor
Location: Midline pons
Exit: Superior orbital fissure, same as III and IV

Question 9

Cranial Nerve VII
Name 
Function
Location of nuclei
Exit

Answer 9

Name: Facial
Function: Mixed motor, visceral efferent, somatic sensory
Muscles of facial expression, taste, hearing
Location: Pons, branchial
Exit: auditory canal, internal acoustic meatus to the stylomastoid foramen

Question 10

What are the 5 branches of the the Cranial Nerve VII?

Answer 10

Facial nerve branches into temporal ,zygomatic, buccal, maxillary and cervical. TEN ZOMBIES BIT MY CAT

Question 11

Cranial Nerve VIII
Name 
Function
Location of nuclei
Exit

Answer 11

Name: Vestibulocochlear
Function: Sensory, hearing
Location of nuclei: medulla
Exit: Travels with VII through internal acoustic meatus

Question 12

Cranial Nerve IX
Name 
Function
Location of nuclei
Exit

Answer 12

Name: Glossopharyngeal
Function: Mixed, mostly sensory, taste
Location of nuclei: medulla
Exit: jugular foramen

Question 13

Cranial Nerve X
Name 
Function
Location of nuclei
Exit

Answer 13

Name: Vagus
Function: Mixed, autonomic, parasympathetic
Branchial, visceral motor/sensory, somatic sensory
Location of nuclei: medulla
Exit: Jugular foramen

Question 14

Cranial Nerve XI

Answer 14

Name: Accessory (spinal)
Function: Motor, contracts sternomastoid, upper trapezius
Location of nuclei: Spinal cord c6
Exit: jugular foramen

Question 15

Cranial Nerve XII
Name 
Function
Location of nuclei
Exit

Answer 15

Name: Hypoglossal
Function: Motor, somatic, intrinsic & extrinsic muscles of tongue
Location of nuclei: midline medulla
Exit: Hypoglossal foramen

Question 16

What does the pupillary reflex test?

Answer 16

Midbrain function

Question 17

What does the corneal blink reflex test?

Answer 17

Trigeminal nucleus located in the pons

Question 18

What does the gag reflex test?

Answer 18

Medullary function, sensory: IX, motor: X (vagus)

Question 19

What is the rule of 4s?

Answer 19

Midbrain and above: I, II, III, IV
Pons: V, VI, VII, VIII
Medulla: VIII, IX, X, XI, XII