Exam 4 (Cranial nerves)

Question 1

Which cranial nerves are pure sensory?

Answer 1

• Olfactory (I),
• Optic (II)
• Vestibulocochlear (VIII)

Question 2

Which cranial nerves are in the mixed category?

Answer 2

• Trigeminal (V),
• Facial (VII),
• Glossopharyngeal (IX)
• Vagus (X)

Question 3

How many skeletal muscles does each eye have?

Answer 3

6

Question 4

What are the 3 eyeball motor cranial nerves?

Answer 4

• Oculomotor (III),
• Trochlear (IV) &
• Abducent (VI)

Question 5

Which cranial nerve is responsible for lateral eye movement?

Answer 5

• Abducent (VI) via Lateral rectus
• (Abduct= going lateral)

Question 6

Which cranial nerve controls 4 eye movement muscles?

Answer 6

Oculomotor (III)

Question 7

What does the accessory nerve control?

Answer 7

Innervates the Sternocleidomastoid & Trapezium muscles

Question 8

What does the Hypoglossal nerve control?

Answer 8

• Tongue & floor of mouth
• (Hypo= under tongue)

Question 9

Which nerve helps with balance?

Answer 9

Vestibulocochlear (VIII)

Question 10

What is the crossover for the optic nerve called?

Answer 10

Optic chiasm

Question 11

Where is the visual cortex located?

Answer 11

In the occipital lobe

Question 12

Where are smells processed?

Answer 12

Near the frontal cortex

Question 13

What are the 3 middle ear bones?

Answer 13

• Malleus,
• Incus &
• Stapes

Question 14

Where are auditory signals processed?

Answer 14

Temporal lobe

Question 15

What are the 2 primary things the Trigeminal nerve takes care of?

Answer 15

Sensory for the front of the head & chewing

Question 16

What are the 3 divisions of the Trigeminal nerve?

Answer 16

• Ophthalmic V1,
• Maxillary V2 &
• Mandibular V3

Question 17

What are the 2 sensory nerves of CN 5V₁ & which one is primary?

Answer 17

• Supraorbital nerve (Primary) &
• Supratrochlear nerve

Question 18

What are the 2 nerves of CN 5V₂?

Answer 18

• Infraorbital nerve &
• Palatine nerve

Question 19

What does CN5V₂ pass through?

Answer 19

Infraorbital foramena

Question 20

What is the major nerve for the jaw?

Answer 20

CN 5V₃ Inferior Alveolar Nerve

Question 21

What are the nerve branches for CN 5V₃?

Answer 21

• Inferior Alveolar nerve,
• Mental nerve &
• Lingual nerve

Question 22

What are the functions of the facial nerve?

Answer 22

• Taste, salivation, cries &
• facial motor function

Question 23

What are the functions of the Glossopharyngeal nerve?

Answer 23

• Sensory (posterior 1/3 of tongue), Inner & middle ear & carotid sinus/bodies
• pharyngeal motor

Question 24

Which facial gland is primarily connected to CN IX?

Answer 24

Parotid gland

Question 25

What nerve is responsible for the aortic arch sensory?

Answer 25

Vagus nerve (X)

Question 26

What nerve is responsible for the cricothyroid muscle?

Answer 26

External branch of the superior laryngeal nerve from the Vagus nerve.

Question 27

What is the outer covering of a nerve?

Answer 27

Outer Epineurium then interior Epineurium

Question 28

What is the border of a nerve fascicle?

Answer 28

Perineurium

Question 29

What is the starting point for a brachial plexus block?

Answer 29

Supraclavicular fossa