Functions of Cranial Nerves

Question 1

What is the component and function of the Olfactory CNI

Answer 1

Special sensory - smell

Question 2

What is the component and function of the Optic CNII

Answer 2

Special sensory - vision

Question 3

What is the two components of Oculomotor CNII

Answer 3

Somatic Motor

Visceral Motor

Question 4

What does the somatic motor component of Oculomotor innervate

Answer 4

Extraocular muscles

• Superior recti
• Inferior recti
• Medial recti
• Inferior oblique

Levator palpebrae superioris (eyelid)

Question 5

What does the visceral motor component of Oculomotor innervate

Answer 5

Parasympathetic:

Pupil - constriction

Ciliary muscle -accommodation of the lens

Question 6

What is the component and function of the Trochlear CNIV

Answer 6

Somatic motor innervates the superior oblique extra ocular muscle

(turns eye downwards)

Question 7

What is the the component and function of Abducent CNVI

Answer 7

Somatic motor innervates lateral rectus extraocular muscle

abducts the eye

Question 8

What is the component and function of the trigeminal Ophthalmic CNV1

Answer 8

General sensory info from:
Cornea 
Forehead
Scalp 
Eyelids 
Nose 
Mucosa of nasal cavity and sinuses

Question 9

What is the component an function of trigeminal maxillary CNV2

Answer 9

General sensory info from:
face over maxilla, maxillary teeth, temperomandibular joint,
mucosa of nose, maxillary sinuses palate

Question 10

What is the two components of trigeminal mandibular CNV3

Answer 10

General sensory

Somatic motor

Question 11

What is the general sensory component of the Trigeminal Mandibular CNV3 function

Answer 11

Info from:
face over mandible, mandibular teeth, temperomandibular joint,
mucosa of mouth, anterior 2/3rds of tongue

Question 12

What is the somatic motor component of the Trigeminal Mandibular CNV3 function

Answer 12

Innervates;

Muscles of mastication,

part of digastric,

tensor veli palatinin (soft palate)

tensor tympani
(ear)

Question 13

What is the four components of the facial CNVII

Answer 13

Somatic motor
Visceral motor
Special sensory
General sensory

Question 14

What is the function of the somatic motor of the facial nerve

Answer 14

Innervates muscles of facial expression scalp,
stapedius of middle ear,
part of digastric muscle

Question 15

What is the function of the visceral motor of the facial nerve

Answer 15

parasympathetic innervation of submandibular & sublingual salivary glands,
lacrimal glands, glands of nose & palate

Question 16

What is the function of the special sensory of the fascial nerve

Answer 16

taste from the interior 2/3rd tongue and soft palate

Question 17

What is the function of the general sensory of the fascial nerve

Answer 17

from external acoustic meatus

Question 18

What is the component and function of the vesibulocochlear CNVIII

Answer 18

Special sensory provides vestibular sensation from semicircular ducts, utricle, saccule gives sense of position and movement

and hearing from cochlea

Question 19

What is the 5 components of the glossopharyngeal CNIX

Answer 19

Special sensory 
General sensory 
Visceral sensory 
visceral motor 
Somatic motor

Question 20

What is the function of the special sensory of the glossopharyngeal CNIX

Answer 20

Taste from posterior 3rd of tongue

Question 21

What is the function of the general sensory of the glossopharyngeal CNIX

Answer 21

provides cutaneous sensations from middle ear and posterior oral cavity

Question 22

What is the function of the visceral sensory of the glossopharyngeal CNIX

Answer 22

sensation from carotid body & carotid sinus

Question 23

What is the function of the visceral motor of the glossopharyngeal CNIX

Answer 23

parasympathetic innervation of parotid gland

Question 24

What is the function of the somatic motor of the glossopharyngeal CNIX

Answer 24

Innervation to stylopharyngeus to helps with swallowing

Question 25

What is the five components of the Vagus CNX

Answer 25

``` Special sensory General sensory Visceral sensory visceral motor Somatic motor ```

Question 26

What is the function of the special sensory of the vagus nerve

Answer 26

Taste from epiglottis and palate

Question 27

What is the function of the general sensory of the vagus nerve

Answer 27

Sensation from auricle, external acoustic meatus

Question 28

What is the function of the visceral sensory of the vagus nerve

Answer 28

``` Receives info from: pharnyx, larynx, trachea, bronchi, heart, oesophagus, stomach, intestine ```

Question 29

What is the function of the visceral motor of the vagus nerve

Answer 29

parasympathetic innervation muscle in bronchi, gut, heart

Question 30

What is the function of the somatic motor of the vagus nerve

Answer 30

Innervation to pharynx, larynx, palate & oesophagus

Question 31

What is the composition and function of the Accessory CNXI

Answer 31

somatic motor innervates striated muscle of soft palate, | pharynx & larynx, sternocleidomastoid & trapezius

Question 32

What is the composition and function of the hypoglossal CNXII

Answer 32

Somatic motor innervating muscles of the tongue

Question 33

What cranial nerve is responsible for smell

Answer 33

Olfactory

Question 34

What cranial nerve is responsible for sight

Answer 34

Optic

Question 35

What cranial nerves is responsible for taste

Answer 35

Facial Glossopharyngeal Vagus

Question 36

What cranial nerve is responsible for hearing and balance

Answer 36

Vestibulocochlear

Question 37

What cranial nerves is responsible for movements of the eye

Answer 37

Oculomotor Trochlear Abduncent

Question 38

What cranial nerve is responsible for movements of the face

Answer 38

Facial

Question 39

What cranial nerve is responsible for sensation from the face

Answer 39

Trigeminal

Question 40

What cranial nerve is responsible for chewing

Answer 40

Trigeminal - mandibular

Question 41

What cranial nerves is responsible for swallowing

Answer 41

Glossopharyngeal and accessory

Question 42

What cranial nerve is responsible for movement of the tongue

Answer 42

Hypoglossal

Question 43

What cranial nerve is responsible for movements of vocal cord

Answer 43

Vagus

Question 44

What cranial nerves is responsible for parasympathetic input

Answer 44

Oculomotor, Facial, Vagus and glossopharyngeal

Question 45

What cranial nerve is responsible for movements in the neck

Answer 45

Accessory

Question 46

What cranial nerves is responsible for visceral sensory input

Answer 46

Vagus and glossopharyngeal