Brain anatomy

Question 1

What does the Falx cerebri do

Answer 1

• creates division and prevents the membrane from moving too much
• create venous sinuses as it folds which collects oxygen depleted blood

Question 2

What do arachnoid granulations do

Answer 2

• structures filled with CSF
• extends into the venous sinuses
• allow drainage of CSF from SA space into Venous System (superior saggital sinus)

Question 3

What are subdural (epiarachnoid space) and extradural spaces (epidural)

Answer 3

• extradural spaces= space between cranial bones and dura mater layer
• subdural= space between meningeal layer of dura matter and the inner arachnoid space

Question 4

3 most important structures of dura mater

Answer 4

▪ Falx cerebri (divides two cerebral hemispheres)
▪ Tentorium cerebelli (divides cerebral hemispheres from
cerebellum)
▪ Dural venous sinuses

Question 5

What does CSF do

Answer 5

• CSF flows through ventricle system
• cushions CNS from physical insult
• produced by filtration blood through CP

Question 6

What is the CerebroSpinal Fluid pathway

Answer 6

• Chloroid Plexus makes CSP
• flows from CP– third ventricle – cerebral aqueduct – forth ventricle– lateral aperture – medium aperture – into subarachnoid space

Question 7

How does the CSF go back to the blood

Answer 7

• brain and spinal cord– into subaracnoid space – venous – filtered out via arachnoid granulations (AVilli)

Question 8

What does the Pia mater do

Answer 8

• delicate but impermeable barrier adhered to cerebral cortex

Question 9

What is contained in Arachnoid mater

Answer 9

it is the subarachnoid space in it and is web like and is filled with CSF that cushions the brain protecting from trauma