Brain Exam 1

Question 1

CN I

Answer 1

name: olfactory
category: special sensory
function: smell
passage: cribriform plate

Question 2

CN II

Answer 2

name: optic
category: special sensory
function: sight
passage: optic canal (w/ ophthalmic v)

Question 3

CN III

Answer 3

name: oculomotor
category: somatic & visceral motor
function: superior/inferior/medial rectus, inferior oblique, levator palpebrae superioris; ciliary, shincter pupillae
passage: superior orbital fissure (w/ sup ophthalmic v)

Question 4

CN IV

Answer 4

name: trochlear
category: somatic motor
function: superior oblique
passage: superior orbital fissure (w/ sup ophthalmic v)

Question 5

CN V1

Answer 5

name: trigeminal
category: somatic sensory
function: sensation to top third of face
passage: superior orbital fissure (nasociliary, frontal supraorbital, lacrimal, tentorial)

Question 6

CN V2

Answer 6

name: trigeminal
category: somatic sensory
function: sensation to middle third of face
passage: foramen rotundum (infraorbital, sup alveolar, zygomatic, greater/lesser palatine nasopalatine, pharyngeal)

Question 7

CN V3

Answer 7

name: trigeminal
category: somatic sensory & motor
function: sensation to lower third of face & mastication muscles
passage: foramen ovale (auriculotemporal, lingual buccal, inf alveolar, mental)

Question 8

CN VI

Answer 8

name: abducent
category: somatic motor
function: lateral rectus
passage: superior orbital fissure

Question 9

CN VII

Answer 9

name: facial
category: somatic & visceral motor, special sensory, somatic sensory
function: muscles of facial expression, salivary glands, lacrimal glands, taste anterior 2/3 tongue
passage: internal acoustic meatus (extracranial branch: stylomastoid foramen; intercranial branch: foramen lacerum/vidian canal)

Question 10

CN VIII

Answer 10

name: vestibulocochlear
category: special sensory
function: hearing, balance
passage: internal acousitc meatus

Question 11

CN IX

Answer 11

name: glossopharyngeal
category: somatic & visceral motor; somatic & visceral sensory
function: taste posterior 1/3 tongue; stylopharyngeus; parynx gag; carotid body/sinus; parotid gland
passage: jugular foramen (tympanic canaliculus, groove for lesser petrosal foramen ovale)

Question 12

CN X

Answer 12

name: vagus
category: somatic & visceral motor; somatic & visceral sensory
function: ear, larynx cough dura; epiglottis taste; glands; palatoglossus
passage: jugular foramen

Question 13

CN XI

Answer 13

name: spinal accessory
category: somatic motor
function: SCM, trapezius
passage: jugular foramen

Question 14

CN XII

Answer 14

name: hypoglossal
category: somatic motor
function: genioglossus, hyoglossus, styloglossus
passage: hypoglossal canal