Cranial nerves

Question 1

which cranial nerves are purely sensory?

Answer 1

1 Olfactory, 2 Optic, 8 Vestibulocochlear

Question 2

which cranial nerves are purely motor?

Answer 2

3 Oculomotor, 4 Trochlear, 6 Abducens, 11 Accessory, 12 Hypoglossal

Question 3

which cranial nerves have mixed sensory and motor function

Answer 3

5 Trigeminal, 7 Facial, 9 Glossopharyngeal, 10 Vagus

Question 4

which cranial nerve carry parasympathetic fibres?

Answer 4

3 Oculomotor, 7 Facial, 9 Glossopharyngeal, 10 Vagus

Question 5

what is the main function of cranial nerve 1 (Olfactory) and the location of its neurons?

Answer 5

Sense of smell - in the nasal epithelium

Question 6

what is the main function of cranial nerve 2 (optic) and the location of its neurons

Answer 6

Sense of sight - in the retina

Question 7

what is the main function of cranial nerve 8 (vestibulocochlear) and the location of its neurons

Answer 7

Hearing and balance - in the spiral ganglion and the vestibular (scarpas) ganglion

Question 8

what is the main function of cranial nerve 3 (Oculomotor) and the location of its neurons

Answer 8

eye movements - in the midbrain

Question 9

what is the main function of cranial nerve 4 (trochlear) and the location of its neurons

Answer 9

eye movements - in the midbrain

Question 10

what is the main function of cranial nerve 6 (abducens) and the location of its neurons

Answer 10

eye movements - in the pons

Question 11

what is the main function of cranial nerve 11 (accessory) and the location of its neurons

Answer 11

motor to specific neck muscles (trapezius & sternocleidomastoid) - in the spinal cord

Question 12

what is the main function of cranial nerve 12 (hypoglossal) and the location of its neurons

Answer 12

motor to tongue - in the medulla

Question 13

what are the main functions of cranial nerve 5 (trigeminal) and the location of its neurons

Answer 13

general sensory = head neck face - throughout the brainstem.
motor = mastication muscles - in the pons

Question 14

what are the main functions of cranial nerve 7 (facial) and the location of its neurons

Answer 14

special sensory = gustation - throughout brainstem

motor - facial expression muscles - in the pons

Question 15

what are the main functions of cranial nerve 9 (glossophayngeal) and the location of its neurons

Answer 15

special sensory = gustation
general sensory = tongue and pharynx - through brainstem
motor = part of pharynx - in the pons

Question 16

what are the main sensory and motor functions of cranial nerve 10 (vagus) and the location of its neurons

Answer 16

special sensory = gustation - throughout brainstem

Motor = part of larynx, pharynx - in the medulla

Question 17

which cranial nerves carry taste

Answer 17

7, 9 and 10

Question 18

where do the parasympathetic nerves of the oculomotor (3) nerve go to

Answer 18

to the eye

Question 19

where do the parasympathetic fibres of the facial (7) nerve go to

Answer 19

Nasal and salivary gland

Question 20

where do the parasympathetic fibres of the glossopharyngeal (9) nerve go to

Answer 20

salivary glands

Question 21

where do the parasympathetic fibres of the vagus (10) nerve go to

Answer 21

heart, lungs, GI tract

Question 22

what two places do cranial nerves arise form

Answer 22

forebrain (1&2) and brainstem (3-12)

Question 23

what do cranial nerves exit the skull through

Answer 23

foramina (holes)

Question 24

in what ways are cranial nerves different from spinal nerves

Answer 24

they follow a different pattern and have different architecture

Question 25

what structure contains all the cranial nerve nuclei

Answer 25

Brainstem