Cranial nerves basics

Question 1

olfactory Nn entry and emergence point

Answer 1

emerges at forebrian and enters at telencephalon

Question 2

olfactory Nn types of fibers

Answer 2

special sensory

Question 3

olfactory Nn fiber distribution

Answer 3

olfactory mucosa of the nose

Question 4

Optic nn entry? emergence?

Answer 4

enters from forebrain and emerges from dienecephalon

Question 5

optic nn general fiber type

Answer 5

special sensory

Question 6

optic nn general distribution

Answer 6

retina

Question 7

oculumotor entry? emergence?

Answer 7

does both at midbrain (mesencephalon)

Question 8

fibers type of oculuomotor

Answer 8

motor

Question 9

distribution of oculomotor nn

Answer 9

intraoccular and four extraoccular mm

Question 10

trochlear entry and emergence

Answer 10

emerges and enters at midbrain

Question 11

trochlear fiber type

Answer 11

motor

Question 12

trochlear distribution

Answer 12

only at superior oblique

Question 13

trigeminal entry and emergence

Answer 13

enters at brainstem and emerges at pons

Question 14

fiber types of the trigeminal nn

Answer 14

mixed: motor and sensory roots

Question 15

distribution of the trigeminal

Answer 15

derivatives of frontonasal process and the 1st pharyngeal arch

Question 16

abducens entry and emergence point

Answer 16

brainstem and pons/medulla junction

Question 17

abducens fiber type

Answer 17

motor

Question 18

abducens distribution

Answer 18

one extra occular mm- ispalateral lat rectus mm

Question 19

facial nn entry and emergence

Answer 19

brainstem and pons/medulla junction

Question 20

facial nn fiber types

Answer 20

mixed: primary root and intermediate nn

Question 21

distribution of facial nn

Answer 21

derivatives of 2nd pharyngeal arch

Question 22

vestibulocochlear nn entry and emergence

Answer 22

brainstem and pons/medulla junction

Question 23

vestibulocochlear nn fiber type

Answer 23

special sensory

Question 24

vestibulocochlear nn distribution

Answer 24

inner ear

Question 25

glossopharyngeal entry and emergence

Answer 25

brainstem and medulla

Question 26

glossopharyngeal fiber types

Answer 26

mixed

Question 27

glossopharyngeal distribution

Answer 27

derivatives of the third pharyngeal arch

Question 28

vagus nn entry and emergence

Answer 28

brainstem and medulla

Question 29

vagus nn fiber

Answer 29

mixed

Question 30

vagus nn distribution

Answer 30

4th arch derivatives

Question 31

Spinal accessory entry and emergence

Answer 31

superior spinal cord

Question 32

spinal accessory fiber types

Answer 32

motor

Question 33

spinal accessory distribution

Answer 33

superficial layer of the neck

Question 34

hypoglossal nn entry and emergence

Answer 34

brainstem and medulla

Question 35

hypoglossal nn fiber type

Answer 35

motor

Question 36

hypoglossal nn distribution

Answer 36

mm of tongue

Question 37

function of CN 1

Answer 37

smell sense from nasal mucosa at superior concha and septum

Question 38

function CN 2

Answer 38

vision from retina

Question 39

function CN 3, what it inn?

Answer 39

somatic motor: superior rectus, inferior rectus, medial rectus, inferior oblique, and levator palpebrae superioris (rotates eye superiorly, inferioirly and medially and raises the eyelids) visceral motor: parasym to sphincter pupillae and ciliary mm to constrict the pupil/ accomodate lens