5 Questions
What are the two layers that compose the dura mater?
The dura mater is composed of the periosteal layer, which is the outer layer that attaches to bone, and the meningeal layer, which is the inner layer closer to the brain.
What are the three concentric membranes that invest the brain and spinal cord?
The outermost layer is the dura matter, the middle layer is the arachnoid matter, and the innermost layer is the pia matter.
What is the subdural space?
The subdural space is the potential space between the dura and arachnoid mater.
What is the subarachnoid space filled with?
The subarachnoid space is filled with cerebrospinal fluid (CSF) and contains the blood vessels supplying the brain.
What is the epidural space in the cranial vault normally closed?
The epidural space in the cranial vault is normally closed since the dura is attached to the periosteum, which is attached to the inner surface of the skull.
Study Notes
Meninges Structure
- The dura mater, the outermost meningeal layer, is composed of two layers: the periosteal layer and the meningeal layer.
Meningeal Layers
- The brain and spinal cord are invested by three concentric membranes: dura mater, arachnoid mater, and pia mater.
Subdural Space
- The subdural space is the space between the dura mater and the arachnoid mater, a potential space that can expand due to bleeding or inflammation.
Subarachnoid Space
- The subarachnoid space, located between the arachnoid mater and the pia mater, is filled with cerebrospinal fluid (CSF), which cushions and protects the brain and spinal cord.
Epidural Space
- In the cranial vault, the epidural space, located between the dura mater and the skull, is normally closed or nonexistent.
Test your knowledge of the meninges, cerebrospinal fluid, and ventricular system with this quiz. Challenge yourself with questions about the protective layers of the brain, including the dura, arachnoid, and pia mater.
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