Session 2 - Osteology and Radiology of Skull

Question 1

Cranium = N + V

Answer 1

Neuro- and Viscero- cranium

Question 2

Bones of Cranium

Answer 2

Frontal, Parietal, Greater wing of Sphenoid, Temporal and Occipital

Question 3

Fontanelle and suture location and

Rare condition; early fusion of fontanelles and sutures

Answer 3

Anterior = Bregma
Posterior = Lambda
(Craniosynostosis)

Question 4

Skull bone arrangement, name of layers

‘Shrink-wrapped in…’

Answer 4

Tri-laminar: outer and inner table of compact bone, middle diploe layer (spongy)
Periosteum

Question 5

Ethmoid bone structure significance

Answer 5

Cribiform bone and plate

Medial roof of nasal cavity

Question 6

Petrous part of temporal bone contains…

Answer 6

Middle and Inner Ear structures

Question 7

Pterion significance

Answer 7

Thinnest part of skull
Maxillary division of middle meningeal artery of the external carotid artery (anterior branch)
IC haemorrhage - extra-dural, lentiform

Question 8

Basilar Skull Fractures Signs:
Anterior =
Middle =
Posterior =

Answer 8

Anterior = periorbital ecchymoses, rhinorrhoea
Middle = Haemotympanum, otorrhoea, mastoid ecchymoses 'Battle's sign'
Posterior = unlikely

Question 9

Facial skeleton bones:

Answer 9

Zygomatic
Maxilla
Nasal
Lacrimal
Mandible

Question 10

TMJ Dislocation

Answer 10

Anterior dislocation of mandibular condyle over articular tubercle
MoM keep locked in anterior displacement