Meninges & Dural Venous Sinuses

What are the 3 cranial meninges from superficial to deep?

Dura Mater

Arachnoid Mater

Pia Mater

What are the two parts of the dura mater in the skull?

Periosteal layer

Meningeal layer

Where is the periosteal layer and is it present in the vertebral column?

Superficial layer

Absent in vertebral column

Where is the meningeal layer and is it present in the vertebral column?

Deeper layer

Continuous in vertebral column as Duran sheath of spinal cord

Name the 3 meningeal spaces and if it’s an actual or potential space

Extradural (Epidural) space (potential space)

Subdural space (potential space)

Subarachnoid space (actual space)

Where is the extradural (epidural) space?

Between the skull and dura mater

Where is the subdural space?

Between the dura and arachnoid mater

Where is the subarachnoid space located and what does it contain?

Space between the arachnoid and pia mater

Location of cerebrospinal fluid and blood vessels around the brain

What is the dural septa?

Meningeal layer of dura mater that forms double layered folds that insert into fissures

What are the important parts of the dural septa?

Falx cerebri

Falx cerebelli

Tentorium cerebelli

What are the dural venous sinuses and what do they contain?

Space created where the two layers of the dura mater separate

Contain venous blood from the veins of the brain and CSF returned from the subarachnoid space