Cranial Nerves

Question 1

Which cranial nerves carry parasympathetic fibres?

Answer 1

CN III, VII, IX, X

Question 2

Mnemonic for CN functions?

Answer 2

Some Say Marry Money But My Brother Says Big Brains Matter Most

Question 3

CN I

Answer 3

Olfactory

Question 4

CN II

Answer 4

Optic

Question 5

CN III

Answer 5

Oculomotor

Question 6

CN IV

Answer 6

Trochlear

Question 7

CN V

Answer 7

Trigeminal

Question 8

CN VI

Answer 8

Abducens

Question 9

CN VII

Answer 9

Facial

Question 10

CN VIII

Answer 10

Vestibulocochlear

Question 11

CN IX

Answer 11

Glossopharyngeal

Question 12

CN X

Answer 12

Vagus

Question 13

CN XI

Answer 13

Spinal Accessory

Question 14

CN XII

Answer 14

Hypoglossal

Question 15

Which cranial nerves are sensory only?

Answer 15

CN I, II, VIII

Question 16

Where does the olfactory nerve synapse?

Answer 16

Olfactory bulb

Question 17

How do the oculomotor and trochlear nerves get to the superior orbital fissure?

Answer 17

Along lateral wall of cavernous sinus

Question 18

Which cranial nerve has the longest route and is easily disrupted in trauma?

Answer 18

Trochlear

Question 19

How does the abducens nerve get to the superior orbital fissure?

Answer 19

Through the centre of the cavernous sinus

Question 20

How does the spinal accessory nerve get to the jugular foramen?

Answer 20

Ascends through the foramen magnum

Question 21

What does CN XI supply?

Answer 21

SCM and trapezius

Question 22

How does the hypoglossal nerve reach the tongue muscles?

Answer 22

Descends lateral to carotid sheath

Question 23

Function of V1?

Answer 23

Sensory to upper eyelid, conjunctiva, orbit + bridge of nose

Question 24

Function of V2?

Answer 24

Sensory to lower eyelid, maxilla, nose ala, upper lip

Question 25

Function of V3?

Answer 25

Sensory AND motor to mandible, TMJ, 2/3rd tongue + bucca mucosa
Motor to mastication muscles, tensor veli palatini + tensor tympani

Question 26

Motor functions of VII?

Answer 26

Muscles of facial expression, stapedius

Question 27

Special sensory and parasympathetic functions of VII?

Answer 27

Parasympathetic- submandibular gland

Taste to anterior 2/3rd of tongue

Question 28

Motor function of IX?

Answer 28

Stylopharyngeus

Question 29

Special sensory function of IX?

Answer 29

Taste to posterior 1/3 of tonuge

Question 30

General sensory functions of IX?

Answer 30

Oropharynx, nasopharynx, laryngopharynx, palatine tonsil, eustachian tube, middle ear

Question 31

Parasympathetic function of IX?

Answer 31

Parotid gland