Skull and Cranial Cavity

Question 1

What is pagets disease?

Answer 1

Causes bone thickening. Enlarged, thicker skull

Question 2

Names of the skull bones

Answer 2

Frontal bone
Parietal
Maxilla
Mandible
Temporal
Zygomatic
Sphenoid
Occipital
Nasal
Ethmoid
Palatine
Vomer

Question 3

Cleidocranial dysplasia

Craniosynostosis

Answer 3

No clavicles, anterior fontanelle open

Early posterior fontanelle ossification, wide forehead, due to wider anterior fontanelle

Question 4

What runs behind the pterion?

Answer 4

Middle meningeal artery

Question 5

Surface anatomy of the pterion

Runs ___cm above the _____, and ___cm posterior to l____ ____ ____

Answer 5

Runs 2.5cm above the zygomatic arch, and 2.5cm posterior to lateral orbit margin

Question 6

Foramen Rotundum

Answer 6

V2 (maxillary division)

Question 7

Foramen ovale

Answer 7

V3 (mandibular division)

lesser petrosal nerve

Question 8

Carotid Canal

Answer 8

Internal carotid artery

Question 9

Foramen Spinosum

Answer 9

MMA

Question 10

Jugular foramen

Answer 10

Internal Jugular vein

CN 9; CN 10; CN 11

Question 11

Foramen Magnum

Answer 11

Spinal cord, vertebral arteries

Acceory ascends through here then out JF

Question 12

Cribiform Plate

Answer 12

Olfactory nerves

Question 13

Optic Canal

Answer 13

Optic Nerve

Opthalmic Artery

Question 14

Superior Orbital fissure

Answer 14

V1 (opthalmic division)
CN3
CN4
CN6
Superior opthalmic vein

Question 15

Foramen lacerum

Answer 15

Cartilage

Question 16

Internal acoustic meatus

Answer 16

Facial nerve

CN8

Question 17

Hypoglossal Canal

Answer 17

Hypoglossal nerve

Question 18

Research paper, Pterion and MMA

Answer 18

Frontozygomatic suture!! (lateral orbit margin) and zygomatic arch.

MMA anterior brach can run in a foramen

For the most part, ant branch of MMA found within 1cm of pterion (68%). 2/3 of the time!

2.6cm behind and 1.3cm above the posterolateral margin of the frontozygomatic suture