cranial nerves

Question 1

CN IV

Answer 1

TROCHLEAR

origin: midbrain

SUPERIOR OBLIQUE
opposite site-eye (contralateral) toward nose and downp

Question 2

CN III

Answer 2

OCULOMOTOR

origin: midbrain

ALL EXTRA-OCULAR

• **except lateral 6 + superior oblique 4 ***
• moves eyeball in many directions, opens upper lid, constricts pupil, and accommodates for near vision

Question 3

CN V

Answer 3

TRIGEMINAL

origin: pons

function: mixed (motor + sensory)
- motor: chewing
- sensory: sensations from head + face

divided into 3 branches (ophthalmic, maxillary, mandibular)

along with CN VII (facial), participates in corneal reflex

Question 4

CN VI

Answer 4

ABDUCENS

origin: pons

LATERAL RECTUS

• eye ball abduction (moving laterally); moves towards temple
• • control over lateral rectus (*LR6)

Question 5

CN III x CN IV x CN VI

Answer 5

OCULOMOTOR x TROCHLEAR x ABDUCENS

oculomotor group
- mutual function to operate with extra-ocular muscles of eyes

Question 6

CN VIII

Answer 6

VESTIBULO-COCCHLEAR

origin: pons

HEARING

Question 7

CN VII

Answer 7

FACIAL

origin: pons

function: mixed (motor + sensory)
- motor: voluntary mov’t of facial muscles, facial expressions
- sensory: taste sensation from anterior and middle thirds of tongue (UPPER AND MIDDLE JIAOS)

• additional parasympathetic action of controlling salivary and lacrimal glands

Question 8

CN X

Answer 8

VAGUS

origin: med ob

function: parasympathetic
- control of visceral organs

• LONGEST NERVE
• participates in gag reflex with CN IX (glossopharyngeal)

Question 9

CN IX

Answer 9

GLOSSOPHARYNGEAL

origin: med ob

function: sensory only
- taste sensation from root of tongue

• MAJOR NERVE FOR SWALLOWING
• GAG REFLEX (w. Vagus)

Question 10

CN XI

Answer 10

ACCESSORY

origin: med ob

controls SCM and trapezius: MOVES HEAD

Question 11

CN XII

Answer 11

HYPOGLOSSAL

origin: med ob

MOVES TONGUE

Question 12

LR6(SO4)3

Answer 12

lateral rectus muscle: controlled by CN VI (abducens)
superior oblique muscle: controlled by CN IV (trochlear)
all other extra-ocular muscles: controlled by CN III (oculomotor)

Question 13

nerves belonging to midbrain

Answer 13

3, 4

Question 14

nerves belonging to pons

Answer 14

5, 6, 7, 8

Question 15

nerves belonging to med ob

Answer 15

9, 10, 11, 12

Question 16

nerves involved in control of taste sensations from tongue, pharynx, and epiglottis

Answer 16

CN VII, IX, X

Question 17

provides SENSORY INPUT for PUPILLARY and accommodation reflex

Answer 17

CN II (optic)

Question 18

provides MOTOR ACTION for PUPIL constriction and accommodation of the lens to near vision

Answer 18

CN III (oculomotor)

Question 19

controls ABDUCTION of the eye

Answer 19

CN VI (abducens)

Question 20

controls SUPERIOR OBLIQUE muscles of the eye

Answer 20

CN IV (trochlear)

Question 21

responsible for MASTICATION and SENSATIONS FROM HEAD AND FACE

Answer 21

CN V (trigeminal)

Question 22

controls ALL SENSATIONS BUT TASTE from ANTERIOR 2/3 of tongue

Answer 22

CN V (trigeminal)

Question 23

controls TASTE sensations from ANTERIOR 2/3 of tongue

Answer 23

CN VII (facial)

Question 24

controls ALL SENSATIONS INCLUDING TASTE FROM ROOT OF THE TONGUE

Answer 24

CN IX (glossopharyngeal)

Question 25

controls TASTE SENSATIONS from EPIGLOTTIS + PHARYNX

Answer 25

CN X (vagus)

Question 26

in charge of FACIAL EXPRESSIONS, lacrimation, salivation

Answer 26

CN VII (facial)

Question 27

major nerve for SWALLOWING and CONTROLLING PAROTID GLAND SECRETION (saliva)

Answer 27

CN IX (glossopharyngeal)

Question 28

sensory for HEARING and EQUILIBRIUM, tested by application of tuning fork

Answer 28

CN VIII (vesibulocochlear)

Question 29

controls SCM + TRAPEZIUS muscles

Answer 29

CN XI (accesory)

Question 30

SENSORY for CORNEAL REFLEX

Answer 30

CN V (trigeminal)

Question 31

MOTOR for CORNEAL REFLEX

Answer 31

CN VII (facial)

Question 32

control of purely TONGUE MOVEMENT

Answer 32

CN XII (hypoglossal)

Question 33

longest cranial nerve of human body, and in control of parasympathetic activities of thoracic, abdominal, pelvic organs

Answer 33

CN X (vagus)

Question 34

O O O T T A F V G V A H

Answer 34

oh oh oh to touch and feel very green vegetables A H!

Question 35

CN I

Answer 35

Olfactory

Question 36

CN II

Answer 36

Optic

Question 37

Gag reflex

Answer 37

``` CN IX (glossopharyngeal) CN X (vagus) ```