The Arachnoid Flashcards
How much Cerebrospinal Fluid (CSF) is produced per day?
500 ml
How much Cerebrospinal Fluid (CSF) circulates at any time?
125-150ml
What is Cerebrospinal Fluid (CSF)?
Straw colouredviscous fluid
Where is Cerebrospinal Fluid (CSF) produced?
The lateral ventricles
Where does Cerebrospinal Fluid (CSF) circulate?
Around the brain & spinal cord in thesubarachnoid space
The Meninges and Cerebrospinal Fluid (CSF) work together to do what?
Cushion the brain + prevent too much movement within the skull
What are the Meninges?
3 layers of fibrous material that surrounds the brain & spinal cord to prevent it from injury + infection
What is Pia Mater?
Very thin, translucent, mesh-like meningeal envelop that lies directly on the surface of the brain
Where is the Arachnoid Mater?
Lies between the Dura + Pia Mater
What is contained in the Arachnoid space?
- Cerebrospinal Fluid (CSF)
- Arterial blood supply (that goes to outside the brain)
Where is the Arachnoid space?
The space between the Arachnoid + Pia Mater
How does the Arachnoid layer attach to the Pia Mater?
Via fibrous strands
What is Dura Mater?
A tough outer layer of the meninges
Where is Dura Mater?
Directly attached to the skull (except where it allows space for the venous supply)
What is the name of the tough outer layer of the meninges that adheres to the skull?
Dura mater
What is the meninges made up of?
- Dura mater (dural sheath)
- Arachnoid mater
- Pia mater
