Dr. P lecture

Question 1

the cranium is divided into two parts which are?

Answer 1

• Neurocranium

- Viscerocranium

Question 2

how many openings are there in the skull

Answer 2

85

Question 3

neurocranium

Answer 3

• eight bones (frontal, ethmoid, sphenoid, occipital, temoral (2), parietal (2))
• bony covering of brainand cranial meninges

Question 4

what bone is the most structurally complex bone in the body

Answer 4

Sphenoid

Question 5

Viscerocranium

Answer 5

• facial skeleton
• fifteen irregular bones (mandible, ethomid, vomer, and paired bones of maxilla, zygomatic, inferior nasal concha, palatine, nasal lacrimal)

Question 6

intermaxillary suture

Answer 6

where the two maxillary bones fuse

under the nose

Question 7

Contains orbit

Answer 7

• eyeball
• extra-ocular muscle
• ophthalmic vessels
• CN II, III, IV, V1 and VI

Question 8

names of sutures

Answer 8

Lambdoid
Frontal
Sagittal
Sphenooccipital (Basilar)

sutures are all fibrous joints

Question 9

Petrous temporal

Answer 9

houses organs of hearing and balance

Question 10

Cranial fossa

Answer 10

anterior
middle
posterior

see these when you take the cap off

Question 11

Anterior cranial fossa

Answer 11

• formed by the frontal, ethmoid and sphenoid
• supports the frontal lobes of the brain
• has cribiform plate and crista galli

Question 12

middle cranial fossa

Answer 12

• formed by sphenoid and temoralis

- has stella turcica, optic canal, foramen spinosum…etc

Question 13

posterior cranial fossa

Answer 13

`-formed by occitpital and temporals

• houses the cerebellum, pons and medulla
• has internal acoustic meatus, jugular foramen and foreman magnum

Question 14

Layers of the scalp

Answer 14

• skin
• connective tissue
• aponerous
• loose connective tissue
• pericranium (dense connective tissue)

Question 15

Crainal meninges

Answer 15

• coverings of the brain
• protection for the brain
• form supporting framework for arteries, veins, and venous sinuses
• three layers: dura mater, arachnoid mter, pia mater

Question 16

dura mater

Answer 16

• two layer (periosteal layer and meningeal layer)

- Dural covers the brain and folds in at points to help to protect things…these are called dural infoldings

Question 17

Dural infolding

Answer 17

• falx cerebri
• tentorium cerebelli
• falx cerebelli
• diahargma sellae

Question 18

Falx cerebri

Answer 18

• largest infolding

- seperates the right and left cerebral hemispheres

Question 19

tentorium cerebelli

Answer 19

• seperates occipital lobes and cerebellum

- tent like apperance

Question 20

falx cerebelli

Answer 20

partially seperates the celebellar hemispheres

Question 21

diaphragma sellae

Answer 21

smallest sural infolding

covers pituitary gland

Question 22

Dural venous sinuses

Answer 22

-drain most blood from brain and endocranial cavity

Question 23

arachnoid mater

Answer 23

-middle layer
-subarachnoid space
between the arachnoid and pia (contains CSF)
-arachnoid villi (projections through dura into superior sagittal sinus)

Question 24

Pia mater

Answer 24

• innermost layer

- clinds directly to brain tissue and dips into convolutions