The cranial nerves

Question 1

for each nerve, see what you have to learn

Question 2

mistakes on table… trigeminal nerve does not have parasympathetic function

Question 3

How can you test the function of CN I?

Answer 3

Strong smelling things such as coffee, cinnamon that don’t irritate the olfactory bulbs
Not done routinely, many other things can affect sense of smell

Question 4

Snellen chart?

Answer 4

Test optic nerve, visual clarity
Different ones used for colour blindness

Question 5

What do all reflexes have? Use pupillary light reflex as an example?

Answer 5

Afferent nerve and efferent nerve
e.g. Optic nerve senses then communication through Edinger-Westphal nucleus to motor nerve occulomotor

Question 6

What nerve gives sensation to the cornea?

Answer 6

Ophthalmic branch of trigeminal

Question 7

4 muscles involved in chewing

Answer 7

Temporalis
Massester
Medial pterygoid
other pterygoid?

Question 8

Problems caused by facial nerve not working?

Answer 8

Sensitive hearing
Can’t blink
No tears - surface of eye will dry out BIG TIME - tape peoples eyes closed with facial nerve palsy

Question 9

Gag reflex?

Answer 9

Afferent nerve - glossopharyngeal
Reflex heads back to the medulla
Efferent nerve - vagus activates muscles