Skull

Question 1

2 divisions of the skull

Answer 1

neurocranium (surrounding brain)

viscerocranium (facial skeleton)

Question 2

What can cause widening of the diploic space?

Answer 2

sickle cell disease
thalassemia
iron deficiency anemia
renal osteodystrophy
hyperarthyroidism

Question 3

Pagets disease

Answer 3

increased head size, thickening of the skull bones particularly of the frontal bone.

Question 4

The skull develops from both …. ossification and … ossification.

Answer 4

intramembranous

endochondral

Question 5

Most of the base of the skull is pre-formed in cartilage including most of the … and … bones.

Answer 5

sphenoid

occipital

Question 6

Anterior fontanelle in a newborn’s skull generally closes at … months of age while the posterior fontanelle closes at …

Answer 6

18-24 months

9 months

Question 7

Craniosynostosis …

Answer 7

premature closure of the sutures that leads to deformities of the head and inhibit proper brain development

Question 8

Parietal bones articulate with each other at …

Answer 8

sagittal suture

Question 9

Parietal bones articulate with occipital bone at the

Answer 9

lambdoid suture

Question 10

Temporal bones (6)

Answer 10

squamous
petrous
mastoid
zygomatic
tympanic
styloid

Question 11

Petrous part is a wedge between … and … bones and encloses the internal ear.

Answer 11

sphenoid and occipital

Question 12

Pterygoid canal houses …

Answer 12

nerve, artery and vein of pterygoid canal

Question 13

sphenopalatine foramen houses…

Answer 13

nasal and nasopalantine nerves, sphenopalatine vessels

Question 14

foramen rotundum houses…

Answer 14

maxillary nerve

Question 15

foramen ovale houses…

Answer 15

mandibular nerve and lesser superficial petrosal nerve

Question 16

foramen spinosum houses..

Answer 16

middle meningeal artery and vein, recurrent branch of mandibular nerve

Question 17

foramen lacerum houses…

Answer 17

internal carotid artery, carotid sympathetic and venous plexus, petrosal nerve

Question 18

optic foramen houses…

Answer 18

optic nerve and ophthalmic artery

Question 19

superior orbital fissure houses…

Answer 19

oculomotor nerve, trochlear nerve, frontal and lacrimal nerves, abducent nerve, and superior ophthalmic vein.

Question 20

inferior orbital fissure houses…

Answer 20

maxillary and zygomatic nerves, infraorbital vessles

Question 21

Ethmoid bone is a single midline bone which helps form the …

Answer 21

anterior cranial cavity, medial wall of the orbit and nasal cavity

Question 22

The crista galli is an extension of the .. and attaches to the falx cerebri.

Answer 22

ethmoid

Question 23

Cribriform plate houses

Answer 23

olfactory nerves, anterior and posterior ethmoid nerve, arteries and veins