meninges and dural venous sinuses

Cranial meninges superficial to deep

Dura mater

Arachnoid mater

Pia mater

Fx:anchor and protect CNS

Parts of dura mater superficial to deep

Periosteal layer - absent in vertebral column

Meningeal layer - double layer folds in fissures

Arachnoid mater

Has CSF and drains it through arachnoid granulations into venous sinus

Pia mater

Firmly attached to brain

Extradural space

Potential space between skull and dura mater

Subdural space

Potential space between dura and arachnoid mater

Subarachnoid space

Actual space between arachnoid mater and pia mater with CSF and blood vessels

Dural septa

3 double layered folds of dura mater

Falx cerebri, falx cerebelli, tentorium cerrebelli

Dural venous sinuses

Space between 2 layers of dura mater that has venous blood

What sinuses drain into confluence of sinuses

Superior Sagittal sinus, straight sinus, occipital sinus

What does inferior sagittal sinus drain into?

Straight sinus

What sinuses are there two of?

Transverse and sigmoid sinuses