Meninges and Dural Venous Sinuses

Question 1

Meningeal Spaces

Answer 1

Extradural space- Between skull and dura mater
Subdural space - between dura and arachnoid mater
Subarachnoid space - Between arachnoid and pia mater

Question 2

Meninges

Answer 2

Dura Mater
Arachnoid Mater
Pia mater

Question 3

Dura Mater

Answer 3

Periosteal layer - superficial layer - absent in vertebral column
Meningeal layer - deeper layer - continuous in vertebral column as dural sheath

Question 4

Arachnoid mater

Answer 4

Arachnoid granulations (Cerebrospinal fluid into venous blood)

Question 5

Pia mater

Answer 5

Deepest layer and snug to the gray matter of brains

Question 6

Dural Septa

Answer 6

Forms double layer folds that insert into fissures
Limits movement of brain and support brain structure
Falx Cerebri - sickle shaped area within fissures
Tentorium cerebelli - inferior layer within fissures, weight support
Falx Cerebelli - under and connects to the dural sheath

Question 7

Dural venous sinuses

Answer 7

Space between two layers of dura mater
Venous blood from veins of the rain and returned CSF from subarachnoid space
Superior sagittal sinus, Inferior sagittal sinus, straight sinus, confluence of sinuses, transfers sinus, occipital sinus, sigmoid sinus
Flow: Inferior- straight sinus, superior, occipital converge at confluence, moves to transverse and sigmoid passes jugular foramen into internal jugular vein.

Question 8

Extradural Hemorrhage

Answer 8

Middle meningeal artery ruptures and creates extradural hematoma

Question 9

Subdural hemorrhage

Answer 9

Cerebral vein rupture hematoma between dura and arachnoid

Question 10

Subarachnoid Hemorrhage

Answer 10

CSF and vessels, arterial rupture and hematoma between Pia and arachnoid mater