Brain 11

Question 1

The meninges consist of which 3 layers?

Answer 1

Dura mater - next to skull
Arachnoid mater
Pia mater - next to brain

Question 2

Describe the Dura Mater

Answer 2

• Thick, tough & durable membrane.
• Dense fibrous connective tissue
• 2 Layers: superficial layer-periosteal & deep layer- Meningeal

Question 3

Within the dura mater the periosteal & Meningeal layer separate & form folds that section the brain into four regions. Name the folds and the seperations

Answer 3

*Falx cerbri separates the cerebral hemispheres
*Tentorium Cerebelli separates the occipital lobes from the cerebellum
Falx Cerebelli separates the cerebellar hemispheres

Question 4

Describe the Arachnoid mater

Answer 4

• Directly under the Dura mater. The 2 membranes are not physically connected- with a “space” inbetween.
• Very thin & transparent membrane that lies on top of cerebral spinal fluid directly inferior to the membrane which together cushions the CNS