CN functions and foramina

Question 1

Which foramen - olfactory nerve?

Answer 1

cribiform plate of ethmoid

Question 2

Function - olfactory nerve?

Answer 2

sensory - smell

Question 3

Nucleus - olfactory nerve?

Answer 3

anterior olfactory nucleus

Question 4

Which foramen - optic nerve?

Answer 4

optic canal

Question 5

Function - optic nerve?

Answer 5

sensory - vision

Question 6

Nucleus - optic nerve?

Answer 6

lateral geniculate nucleus

Question 7

Which foramen - oculomotor nerve?

Answer 7

superior orbital fissure

Question 8

Function - oculomotor nerve?

Answer 8

motor innervation of: dorsal rectus, medial rectus, ventral rectus, ventral oblique

collectively perform most eye movements…

(raises upper lid, turns eyeball up/down/medially), constricts pupil, accommodates eye.

Question 9

Nucleus - oculomotor nerve?

Answer 9

oculomotor nucleus, edinger-westphal nucleus

Question 10

Foramen - trochlear nerve?

Answer 10

superior orbital fissure

Question 11

Function - trochlear nerve?

Answer 11

motor - innervates superior oblique - turns eyeball downwards & laterally

Question 12

Nucleus - trochlear nerve?

Answer 12

trochlear nucleus

Question 13

Foramen - trigeminal nerve?

Answer 13

V1 - superior orbital fissure
V2 - foramen rotundum
V3 - foramen ovale

Question 14

Function - trigeminal nerve - V1 branch?

Answer 14

V1 - Ophthalmic - sensory

• from the scalp to the skin of the nose
• mucous membrane of paranasal sinuses and nasal cavity

Question 15

Function - trigeminal nerve - V2 branch?

Answer 15

V2 - Maxillary - sensory

• maxillary skin
• maxillary teeth
• maxillary sinus
• mucous membrane of nose
• palate

Question 16

Function - trigeminal nerve - V3 branch?

Answer 16

V3 - Mandibular - sensory and motor

Sensory:

• skin
• mandibular teeth
• TMJ
• mucous membrane of mouth
• general sensation anterior 2/3 tongue via lingual branch

Motor:
-muscles of mastication (masseter, temporalis, medial pterygoid, lateral pterygoid)

• accessory muscles of mastication (anterior belly of digastric, mylohyoid)
• tensor tympani & tensor veli palatini

Question 17

Nucleus - trigeminal nerve?

Answer 17

principal sensory trigeminal nucleus, spinal trigeminal nucleus, mesencephalic trigeminal nucleus & trigeminal motor nucleus

Question 18

Which foramen - abducens nerve?

Answer 18

superior orbital fissure

Question 19

Function - abducens nerve?

Answer 19

motor - lateral rectus muscle - turns eyeball laterally

Question 20

Nucleus - abducens nerve?

Answer 20

abducens nucleus

Question 21

Which foramen - facial nerve?

Answer 21

internal acoustic meatus & stylomastoid foramen

Question 22

Function - facial nerve?

Answer 22

sensory and motor

Sensory:
-special sensation taste to anterior 2/3 tongue via chorda tympani

Motor:

• muscles of facial expression
• stapedius of ear

Secretomotor:

• submandibular and sublingual glands
• lacrimal glands

Question 23

Nucleus - facial nerve?

Answer 23

facial nucleus, solitary nucleus, superior salivary nucleus

Question 24

Foramen - vestibulocochlear nerve?

Answer 24

internal acoustic meatus

Question 25

Function - vestibulocochlear nerve?

Answer 25

sensory - sound, balance & movement

Question 26

Nucleus - vestibulocochlear nerve?

Answer 26

vestibular nuclei & cochlear nuclei

Question 27

Foramen - glossopharyngeal nerve?

Answer 27

jugular foramen

Question 28

Function - glossopharyngeal nerve?

Answer 28

sensory and motor Sensory: -special taste and general sensation posterior 1/3 tongue Motor: -stylopharyngeus muscle Secretomotor: -parotid glands

Question 29

Nucleus - glossopharyngeal nerve?

Answer 29

nucleus ambguus, inferior salivary nucleus & solitary nucleus

Question 30

Foramen - vagus nerve?

Answer 30

jugular foramen

Question 31

Function - vagus nerve?

Answer 31

sensory and motor Branchiomotor: -most laryngeal and pharyngeal muscles Parasympathetic: -thoracic and abdominal viscera Sensory: -special sense of taste from epiglottis

Question 32

Nucleus - vagus nerve?

Answer 32

nucleus ambiguus, dorsal motor vagal nucleus, solitary nucleus

Question 33

Foramen - accessory nerve?

Answer 33

jugular foramen

Question 34

Function - accessory nerve?

Answer 34

motor - controls muscles of the neck and overlaps with functions of vagus

Question 35

Nucleus - accessory nerve?

Answer 35

nucleus ambiguus & spinal accessory nucleus

Question 36

Foramen - hypoglossal nerve?

Answer 36

hypoglossal canal

Question 37

Function - hypoglossal nerve?

Answer 37

motor - muscle movement of the entire tongue and other glossal muscles

Question 38

Nucleus - hypoglossal nerve?

Answer 38

hypoglossal nucleus