Meningeal Layers and Spaces

Question 1

List in order.

Answer 1

Calvaria (skull cap)
Epidural space (potential space)
Dura mater (thick)
Infoldings of the dura mater:
- Falx cerebri (separates the cerebral hemispheres)
- Falx cerebelli (separates the cerebellar hemispheres)
- Tentorium cerebelli (separates the cerebrum from the cerebellum, encases the cerebellum)
Subdural space (potential space)
Arachnoid mater (thin membrane on brain, can be lifted)
Subarachnoid space (REAL space, where CSF and blood vessels are)
Pia mater (non-dissectible, touching direct surface of brain)

Question 2

Pia Mater

Answer 2

Non-dissectible. Touching direct surface of brain.

Question 3

Arachnoid Mater

Answer 3

Thin membrane on brain. Can be lifted up. Subarachnoid space below.

Question 4

Subarachnoid space

Answer 4

Below Arachnoid Mater. REAL space. Contains CSF and blood vessels.

Question 5

Subdural space

Answer 5

Below dura mater. Potential space.

Question 6

Epidural space

Answer 6

Potential space. In between skull cap (Calvaria) and Dura Mater.

Question 7

Skull Cap

Answer 7

Calvaria

Question 8

Dura Mater

Answer 8

Thickest layer. Separated into four pieces (during dissection).

Question 9

Falx Cerebri

Answer 9

Separates cerebral hemispheres. An infolding of Dura Mater.

Question 10

Falx Cerebelli

Answer 10

Separates cerebellar hemispheres. An infolding of Dura Mater.

Question 11

Tentorium Cerebelli

Answer 11

Separates Cerebrum from Cerebellum. Encases Cerebellum (like tent).