layers of the skull

Question 1

what are the layers of the skull

Answer 1

• skin
• dense connective tissue
• aponeurotic tissue
• loose connective tissue
• pericranium

Question 2

what are the 3 meninges

Answer 2

• dura mater - has periosteal layer and meningeal layer
• arachnoid
• pia mater

Question 3

where is dura matter found

Answer 3

• fused together in the canal cavity
• periosteal outer layer that lines the inner surface of the flat bones
• meningeal layer is the innermost kayaker throughout the cranial cavity

Question 4

where is arachnoid layer found

Answer 4

lines and follows the inner surface of the meningeal dura

Question 5

what are the projections of the arachnoid

Answer 5

• arachnoid granulations
• penetrate dura matter and extend into the superior digital dural venous sinus
• where the CSF returns to the systemic venous circulation

Question 6

where is Pia mater found

Answer 6

• tightly invests the surfaces of the brain and cannot be dissected away

Question 7

what is the epidural space

Answer 7

located between the periosteum and dura matter
- created by haemorrhage of middle meningeal artery or dural venous sinus

Question 8

what is subdural space

Answer 8

between dura and arachnoid mater
- created by haemorrhage of bridging veins

Question 9

what is subarachnoid space

Answer 9

• contains cerebral arterial circle of willis
• space between arachnoid and pia matter filled with cerebrospinal fluid