CN's and Facial Nerve

Question 1

4 causes CN1

Answer 1

• URTI
• close head injury
• nasal polyps
• esthesioneuroblastoma

Question 2

2 causes CN2

Answer 2

• pituitary gland

- orbital haematoma- post sinus surgery

Question 3

2 causes of CN3

Answer 3

• posterior communicating artery aneurysm

- DM

Question 4

2 causes of CN4

Answer 4

• congenital

- head trauma

Question 5

4 causes of CN6

Answer 5

TRST

• trauma
• RICP
• stroke
• tumor

Question 6

3 causes V2

Answer 6

• acute sinusitis
• orbital floor fracture
• palatal mass

Question 7

3 causes V3

Answer 7

• mandibular fracture
• mandibular tumor
• trigeminal neuroma

Question 8

1 cause CN9

Answer 8

• mass compression at jugular foramen

Question 9

4 causes CN10

Answer 9

• intubation injury
• thyroidectomy
• Sx-cervical disc fusion
• lung mass

Question 10

2 causes cn11

Answer 10

• perineural neck mets

- neck dissection

Question 11

UMN causes of facial nerve palsy

Answer 11

CVS

MS

Question 12

intra-cranial causes CN7

Answer 12

4abbrev
- MS/ MG/ TB/ GBS
3 diseases
- mobius/ neurosarcoid/ lyme
2 tumors
- glomus/ schwannoma

Question 13

intra-temporal causes CN7

Answer 13

3 EAR
- acute OE/ malig OE/ cholesteatoma
TRAUMA- temporal OR iatrogenic (sx)
INFECTION-- Ramsy Hunt
MALIG-- SCC

Question 14

surgical causes of CN7

Answer 14

• parotidectomy
• mastoidectomy
• sx for schwannoma

Question 15

extra-cranial causes CN7

Answer 15

• trauma

- malignancy parotid

Question 16

ganglion for ramsy hunt

Answer 16

geniculate ganglion

Question 17

BELLS PALSY constant

Answer 17

• diffuse weakness to peripheral branches
• acute and progressive
• improves in 6 months

Question 18

BELLS PALSY variable

Answer 18

• viral prodrome
• facial/ retroaurticular pain
• hyperaccusis
• faicla numbness
• dysguesia

Question 19

tx facial nerve palsy

Answer 19

• prednisolone - 30mg
• acyclovir- 200mg 5x/day
• hypermellose drops
• lacritube ointment and tape

Question 20

failed treatment for facial nerve palsy – what next?

Answer 20

MRI –> EXCLUDE TUMOR

Question 21

what treatment for failed CN7?

Answer 21

• tarsorrhaphy- goal weight
• temporalis sling– statis reconstruction
• nerve graft– facial reanimation

Question 22

3 scales for facial nerve palsy

Answer 22

HOUSE BRACKMAN
SUNNY BROOK
YANAGIHARA

Question 23

house brackmann:

Answer 23

1- normal
2- slight asymmetry
3- weak at rest, synkinesis, OK eye closure
4- poor eye closure, synkinesis
5- flicker of movement
6- TOTAL PARALYSIS