Cranial Nerves

Question 1

CN I Name

Answer 1

Olfactory

Question 2

CN I Foramen

Answer 2

Cribiform plate of the ethmoid bone

Question 3

CN I Components

Answer 3

Special visceral afferent (SVA)

Question 4

CN I Structures innervated

Answer 4

Olfactory nasal mucosa (smell)

Question 5

CN II Name

Answer 5

Optic

Question 6

CN II Foramen

Answer 6

Optic foramen

Question 7

CN II Components

Answer 7

Special somatic afferent (SSA)

Question 8

CN II Structures innervated

Answer 8

Retina

Question 9

CN III Name

Answer 9

Oculomotor

Question 10

CN III Foramen

Answer 10

Superior orbital fissure

Question 11

CN III Components

Answer 11

General Visceral Efferent (GVE) General Somatic Efferent (GSE)

Question 12

CN III Structures innervated

Answer 12

Sphincter pupillae & Ciliary muscles Superior, Medial, inferior recti and inferior oblique as well as levator palpebrae superioris

Question 13

CN IV Name

Answer 13

Trochlear

Question 14

CN IV Foramen

Answer 14

Superior orbital fissure

Question 15

CN IV Components

Answer 15

General somatic efferent (GSE)

Question 16

CN IV structures innervated

Answer 16

Superior oblique eyeball muscle

Question 17

CN V Name

Answer 17

Trigeminal

Question 18

Branches of CN V

Answer 18

V1: Opthalmic V2: Maxillary V3: Mandibular

Question 19

CN V Foramen

Answer 19

V1: Superior orbital fissure V2: Foramen rotundum V3: Foramen ovale

Question 20

CN V Components

Answer 20

General somatic afferent (GSA) Special visceral efferent (SVE)

Question 21

CN V Structures innervated

Answer 21

V1) structures of upper face V2) Skin of mimd face, upper teeth, nasal and palatal muccosa V3) Skin of lower face, jaw, floor of mouth, anterior 2/3 of tongue, lower teeth and gums, ear pinna and canaal SVE: motor to muscles of mastication

Question 22

CN VI Name

Answer 22

Abducens nerve

Question 23

CN VI Foramen

Answer 23

Superior orbital fissure

Question 24

CN VI Components

Answer 24

General somatic efferent (GSE)

Question 25

CN VI Structures Innervated

Answer 25

Motor to lateral rectus muscle

Question 26

CN VII Name

Answer 26

Facial

Question 27

CN VII Foramen

Answer 27

Internal auditory meatus --\> Stylomastoid foramen

Question 28

CN VII Components

Answer 28

GVA SVA GSA GVE SVE

Question 29

CN VII Innervations

Answer 29

GVA: deep sensory from soft palate SVA: taste buds from anterior 2/3 tongue GSA: Sensory from small part of ear pinna GVE: Motor to submandibular, sublingual, lacrimal glands and glands in nasal mucosa SVE: motor to muscles of facial expression, posterior belly of digastric, stylohyoid stapedius

Question 30

CN VIII Name

Answer 30

Vestibulocochlear

Question 31

CN VIII Foramen

Answer 31

Internal auditory meatus

Question 32

CN VIII Components

Answer 32

SSA

Question 33

CN VIII Structures Innervated

Answer 33

Cochlear duct Semicircular canals of vestibule

Question 34

CN IX Name

Answer 34

Glosso-pharyngeal

Question 35

CN IX Foramen

Answer 35

Jugular foramen

Question 36

CN IX Components

Answer 36

GVA SVA GSA GVE SVE

Question 37

CN IX Structures Innervated

Answer 37

GVA: Deep sensory from posterior tongue, soft palate, pharynx, mucosa of tympanic cavity ,auditory tube, carotid body and sinus SVA: Taste buds on posterior 1/3 of tongue and adjacent pharynx GSA: General sensory from small part of ear pinna and canal GVE: Parotid salivary gland SVE: stylopharyngeus muscle

Question 38

CN X Name

Answer 38

Vagus

Question 39

CN X Foramen

Answer 39

Jugular foramen

Question 40

CN X Components

Answer 40

GVA SVA GSA GVE SVE

Question 41

CN X Structures Innervated

Answer 41

GVA: visceral sensory from pharynx, esophagus, trachea, larynx and abdominal viscera SVA: Taste buds from epiglottis and glottis GSA: Sensory from small part of ear pinna, canal and tympanic membrane GVE: Thoracic and abdominal viscera SVE: Muscles of pharynx and larynx, levator palatini and cricothyroid

Question 42

CN XI Name

Answer 42

Spinal accessory nerves

Question 43

CN XI Foramen

Answer 43

Foramen magnum and jugular foramen

Question 44

CN XI Components

Answer 44

SVE

Question 45

CN XI Structures innervated

Answer 45

sternocleidomastoid and trapezius

Question 46

CN XII Name

Answer 46

Hypoglossal

Question 47

CN XII Foramen

Answer 47

Hypoglossal canal

Question 48

CN XII Components

Answer 48

GSE

Question 49

CN XII Structures Innervated

Answer 49

Intrinsic and extrinsic muscles of the tongue