CN V: trigeminal nerve

Question 1

what are the three branches of the trigeminal nerve?

Answer 1

V1: ophthalmic nerve
V2: maxillary nerve
V3: mandibular nerve

Question 2

what is the function of the opthalmic nerve?

Answer 2

sensory innervation
afferent corneal reflex (blink reflex)

Question 3

what is the function of the maxillary nerve?

Answer 3

sensory innervation

Question 4

what is the function of the mandibular nerve?

Answer 4

sensory innervation
motor innervation of the lateral pterygoid, medial pterygoid, masseter and temporalis muscles

Question 5

how is the trigeminal nerve tested?

Answer 5

sensation tested by sharp and soft
opthalmic nerve tested by cotton tip on cornea
mandibular nerve tested by opening and clenching the jaw, palpation of temporalis and masseter and pterygoids in open mouth

Question 6

what are s&s of trigeminal sensory neuropathy?

Answer 6

facial numbness over innervated areas

Question 7

what is trigeminal neuralgia?

Answer 7

a severe, episodic facial pain in the distribution of one or more branches of the trigeminal nerve

Question 8

what triggers trigeminal neuralgia?

Answer 8

touching the face
cold wind on the face
talking
vibration
cleaning of teeth

Question 9

what is herpes zoster?

Answer 9

an acute viral disease that affects the trigeminal nerve cause by the varicella zoster virus

Question 10

what are the s&s of herpes zoster?

Answer 10

radicular pain with hyperaesthesia
unilateral rash following the dermatomes
erythema with papules
risk of blindness when the opthalmic nerve is involved