Blood Supply/Meninges

Question 1

Meninges

Answer 1

Skull -> epidural space -> dura -> subdural space -> arachnoid -> subarachnoid space -> pia

Question 2

Dura

Answer 2

outer layer

• attached to skull and arachnoid
• 2 layers fused with exceptions for sinuses
• above cerebrum

Question 3

Arachnoid

Answer 3

• delicate, loosely attached
• projections of arachnoid villi pierce dura and protrude into sinus
• allows CSF into sinuses
• subarachnoid hemorrhage = blood on brain, worst kind!

Question 4

Pia

Answer 4

• tightly wrapped
• thin
• stuck right to surface

Question 5

BS to Brainstem and Cerebellum

Answer 5

Vertebral arteries

Question 6

BS to Cerebral hemispheres

Answer 6

• internal carotids and posterior cerebral a
  1) Anterior cerebral = frontal lobe
  2) Middle cerebral = temporal, parietal
  3) Posterior cerebral = temporal, occipital

Question 7

Venous System

Answer 7

Drain into dural sinuses -> internal jugular v

- Superficial to deep vv –> sinuses –> drain into internal jugular v