Cranial Nerves

Question 1

How many pairs of cranial nerves?

Answer 1

12

Question 2

Which nerves have nuclei in the brainstem?

Answer 2

CN 3-12

Question 3

What are the 12 nerves?

Answer 3

Olfactory
Optic
Oculomotor
Trochlear
Trigeminal
Abducent
Facial
Vestibulocochlear
Glossopharyngeal
Vagus
Spinal accessory
Hypoglossal

Question 4

The trochlear nerve comes off where?

Answer 4

Posterior dorsal brainstem

Question 5

Vestibulocochlear nerve is sensory or motor?

Answer 5

Only sensory

Question 6

Anterior cranial fossa

Answer 6

Foramina of cribriform plate

bulbs from the Olfactory Nerves (CN 1)

Question 7

Middle cranial fossa

Answer 7

Optic canal 
superior orbital fissure
Foramen rotundum
Foramen ovale
Foramen spinosum
Foramen lacerum

Question 8

Optic canal

Answer 8

optic nerve (CN II) and opthalamic artery

Question 9

Superior orbital figure

Answer 9

oculomotor n.
trochlear n.
opthalamic n.
abducent n.
ophthalmic veins

Question 10

Foramen rotundum

Answer 10

Maxillary nerve (CNv2)

Question 11

Foramen ovale

Answer 11

mandibular nerve (CNv3)

Question 12

Foramen spinosum

Answer 12

middle meningeal artery and vein

Question 13

Foramen lacerum

Answer 13

internal carotid artery

passing horizontally

Question 14

Posterior cranial fossa

Answer 14

Internal acoustic meatus
Jugular foramen
Hypoglossal canal
Foramen magnum

Question 15

Internal acoustic meatus

Answer 15

Facial n. (CN VII) Vestibulocochlear n. (CN VIII)

Question 16

Jugular foramen

Answer 16

Glossopharyngeal n. (CN IX)
Vagus n. (CN X) Spinal accessory n. (CN XI)
Internal jugular vein

Question 17

Hypoglossal canal

Answer 17

hypoglossal nerve CNXII

Question 18

Foramen magnum

Answer 18

Medulla and meninges
Spinal root CNXI
Vertebral arteries

Question 19

Sensory (afferent)

Answer 19

Somatic sensory (general sensory)
Visceral sensory (general visceral afferent)
Special sensory

Question 20

Example of somatic sensory

Answer 20

CN V

Question 21

Example of visceral sensory

Answer 21

CN X

Question 22

Example of special sensory

Answer 22

CN II

Question 23

somatic sensory

Answer 23

touch, pain, pressure, temperature, proprioception

Question 24

visceral sensory

Answer 24

reflex or pain sensation from viscera, glands, and blood vessels

Question 25

special sensory

Answer 25

hearing, balance, vision, olfaction

Question 26

Motor (efferent)

Answer 26

somatic motor | visceral motor

Question 27

Somatic motor

Answer 27

innervation of skeletal muscles CNVII

Question 28

Visceral motor

Answer 28

innervation of smooth muscle CNX

Question 29

Motor is ___ and sensory is ____

Answer 29

motor is medial and sensory is lateral

Question 30

What do branchiomotor fibers innervate?

Answer 30

Innervate striated muscle under voluntary control

Question 31

Why are branchiomotor fibers considered visceral?

Answer 31

Develop in association with the cranial (proximal) end of the gut tube ---the brachial arches

Question 32

Is there an equivalent to branchiomotor fibers?

Answer 32

There is no equivalent in the trunk and limbs

Question 33

What is the innervation of branchial arch muscles?

Answer 33

Branchiomotor nerves

Question 34

Cranial nerves carry three types of motor fibers

Answer 34

Somatic motor fibers Branchiomotor fibers Autonomic fibers

Question 35

Somatic motor fibers

Answer 35

Somatic striated muscles and voluntary

Question 36

Somatic motor voluntary nucleus

Answer 36

Oculomotor Trochlear Abducens Hypoglossal

Question 37

Branchiomotor voluntary nucelus

Answer 37

Trigeminal Facial Nuc. Ambiguus Cervical Accessory Nuc