Temporal bone

Question 1

Facial nerve segments

Answer 1

1. Intracranial (cisternal)
2. Canalicular (IAC)
3. Labyrinthine (IAC to geniculate ganglion)
4. Tympanic (geniculate ganglion to pyramidal eminence)
5. Mastoid (Pyramidal eminence to stylomastoid foramen)

Question 2

The most common complication associated with temporal bone fractures is

Answer 2

ossicular injury resulting in variable hearing loss

Question 3

Most vulnerable ossicle to injury

Answer 3

Incus.

Due to the anatomy and supportive ligamentous structures stabilizing the malleus and stapes, the incus is the most vulnerable to injury and as a result most ossicular dislocations or subluxations involve the incus.

Question 4

Complications related to temporal bone fractures

Answer 4

facial nerve injury, perilymphatic fistula, vertigo, CSF leak, meningitis and aquired cholesteatomas

Question 5

Branches of the facial nerve

Answer 5

Two zebras bit my children:

Temporal, Zygomatic, Buccal, mandibular, cervical