8 - Cranial Nerves, Brain, Vessels

Question 1

The EXTERNAL carotid artery goes to

Answer 1

Head & face

Question 2

The – aa enter cranium thru foramen magnum

Answer 2

Vertebral aa

Question 3

Middle meningeal a enters cranium thru

Answer 3

Foramen spinosum (smallest hole)

Question 4

The INTERNAL carotid aa divide into – & – – aa that supply the brain

Answer 4

Anterior & middle cerebral aa

Question 5

– aa merge to form the basilar artery, which has branches to form the Circle of Willis

Answer 5

Vertebral

Question 6

Arteries delivering blood to circle of Willis

Answer 6

Internal carotid a

Basilar a

Question 7

4 arteries forming the circle of Willis

Answer 7

• anterior cerebral a (from internal carotid a)
• posterior cerebral a (from basilar a)
• posterior communicating a
• anterior communicating a (connecting anterior cerebral aa)

Question 8

Most of the venous blood of cranium drains thru the

Answer 8

Dural venous sinuses

-no valves

Question 9

Name the 4 main components of the dural venous sinus system

Answer 9

1. Sagittal sinus - superior & inferior
2. Straight sinus
3. Transverse sinus - left & right
4. Sigmoid sinus - left & right

Question 10

The external and internal JUGULAR veins drain into the

Answer 10

Subclavian vein

Question 11

Oh Oh Oh, To Touch And Feel Very Good Velvet, AH!

Answer 11

Olfactory n
Optic n
Oculomotor n
Trochlear n
Trigeminal
Abducens
Facial
Vestibulocochlear 
Glossopharyngeal
Vagus
Accessory
Hypoglossal

Question 12

Some Say Money Matters, But My Brother Says Big Boobs Matter Most

Answer 12

Sensory
Motor
Both

Question 13

Nerve, sensory or motor, exit:

CN I

Answer 13

Olfactory
Sensory: smell
Cribriform plate

Question 14

Nerve, sensory or motor, exit:

CN II

Answer 14

Optic n
Sensory
Exit: optic canal

Question 15

Nerve, sensory or motor, exit:

CN III

Answer 15

OculoMOTOR m
Motor: extrinsic eye m
Exit: superior orbital fissure

Question 16

Nerve, sensory or motor, exit:

CN IV

Answer 16

Trochlear n
Motor: superior oblique m of the eye
Exit: superior orbital fissure

Question 17

CN V

Answer 17

Trigeminal n
Both
V1: opthalmic; exits thru superior orbital fissure
V2: maxillary; exits thru foramen rotundum
V3: mandibular: exits thru foramen ovale

Question 18

CN VI (6)

Answer 18

Abducens n
Motor: lateral rectus m of eye
Exit: superior orbital fissure

Question 19

CN VII

Answer 19

Facial n
Both: sensory for taste; motor for glands
Exit: internal acoustic meatus

Question 20

CN VIII

Answer 20

Vestibulocochlear n
Sensory: hearing
Exit: internal acoustic meatus

Question 21

CN IX (9)

Answer 21

Glossopharyngeal n
Both!!
Sensory: posterior 1/3 of tongue
Motor: styloPHARYNgeus m
Exit: jugular foramen

Question 22

CN X (10)

Answer 22

Vagus n
Both
Exit: jugular foramen (heart shaped)

Question 23

CN XI (11)

Answer 23

(Spinal) accessory n
Motor: trapezius m and sternocleidomastoid m
Exit: jugular foramen

Question 24

CN XII

Answer 24

Hypoglossal n
Motor: tongue m
Exit: hypoglossal canal

Question 25

What exits here: Cribriform plate

Answer 25

CN I aka olfactory

*smell, sight, taste…smell comes before sight (optic n, CN II)

Question 26

What exits here: optic canal

Answer 26

CN II aka Optic n

Question 27

What exits here: superior orbital fissure

Answer 27

CN III: oculomotor
IV: Trochlear
V1: opthalmic
VI: abducens

Question 28

What exits here: Internal acoustic meatus

Answer 28

CN VII - facial

CN VIII- Vestibulocochlear

Question 29

What exits here: jugular foramen

Answer 29

Internal jugular v
CN IX-glossopharyngeal (tongue)
CN X-vagus n
CN XI-accessory n

Question 30

What exits here: hypoglossal canal

Answer 30

CN XII

Question 31

What exits here: forearm spinosum

Answer 31

Middle meningeal a

Question 32

What exits here: foramen magnum

Answer 32

Spinal cord and vertebral aa => basilar a => posterior cerebral a

Question 33

The internal carotid a goes to the

Answer 33

Brain