A&P Lab Exercise 14

Question 1

What nervous system do the cranial nerves belong to?

Answer 1

Peripheral nervous system

Question 2

How many pairs of cranial nerves are there? How many come from the brainstem?

Answer 2

12 pairs, 10 pairs from the brainstem

Question 3

Which cranial nerves are sensory only?

Answer 3

Olfactory, optic, and vestibulocochlear

Question 4

Which cranial nerves are mainly motor?

Answer 4

Oculomotor, trochlear, abducens, accessory, and hypoglossal

Question 5

Which cranial nerves are mixed?

Answer 5

Trigeminal, facial, glossopharyngeal, and vagus

Question 6

What is the function of the olfactory nerve?

Answer 6

Smell (connects with the cribiform plate)

Question 7

What is the function of the optic nerve?

Answer 7

Vision - fibers either cross at the optic chiasma or continue straight back

Question 8

What is the function of the oculomotor nerve?

Answer 8

Movement of the eyelid (OPEN) and eyeball
Controls muscle for focusing
Controls muscle for pupil size
Controls SR, IR, MR, and IO

Question 9

What is the function of the trochlear nerve?

Answer 9

Movement of the eyeball

Controls SO

Question 10

What is the function of the trigeminal nerve?

Answer 10

Chewing (muscle of mastication)

Sends impulses of temp, pain, and touch from the face and teeth

Question 11

What is the function of the abducens nerve?

Answer 11

Movement of eyeball laterally

Controls LR

Question 12

What is the function of the facial nerve?

Answer 12

Facial expression
Secretion of saliva and tears
Taste on the anterior 2/3 of the tongue
CLOSES eyelid

Question 13

What is the function of the vestibulocochlear nerve?

Answer 13

Hearing and balance

Question 14

What is the function of the glossopharyngeal nerve?

Answer 14

Secretion of saliva
Swallowing
Taste (posterior 1/3 of tongue)

Question 15

What is the function of the vagus nerve?

Answer 15

Controls smooth muscles and gland of GI tract
Sensations from viscera
Controls blood pressure

Question 16

What is the function of the accessory nerve?

Answer 16

Control some swallowing movements
Movement of head
Controls SCM and trapezius

Question 17

What is the function of the hypoglossal nerve?

Answer 17

Movement of tongue during speech and swalowing

Sticking out the tongue

Question 18

Is the tongue a smooth or skeletal muscle?

Answer 18

Skeletal

Question 19

How do you test the facial nerve?

Answer 19

Ask the patient to wrinkle their forehead (raise eyebrows), wrinkle their nose, and smile

Question 20

What are the three branches of the trigeminal nerve?

Answer 20

1. Opthalamic
2. Maxillary
   Mandibular

Question 21

Which branch of the trigeminal nerve is numbed when you’re at the dentist?

Answer 21

Maxillary

Question 22

What is Bells palsy?

Answer 22

The temporary paralysis of a side of the face due to compression of CN VII; resolves over time

Question 23

Which nerve is right next to the pituitary gland?

Answer 23

Optic nerve III

Question 24

What does proprioception mean?

Answer 24

Knowing where you are in space

Question 25

Which nerves have control over swallowing?

Answer 25

IX, XI, XII

Question 26

Which nerves have control over the movement of the eyeball?

Answer 26

III, IV, VI

Question 27

Which ocular muscle is attached to a pulley?

Answer 27

Superior oblique

Question 28

What motions does the superior oblique control?

Answer 28

In and down (look at the tip of the nose)

Question 29

What motions does the inferior oblique control?

Answer 29

Our and up