Questions and Answers
What is the strongest layer of the meninges?
Dura mater
Which space contains cerebrospinal fluid (CSF)?
Subarachnoid space
What does the tentorium cerebelli separate?
Cerebrum and cerebellum
Where is the epidural space located?
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What follows the contour of the dura mater?
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Which fold of the dura mater separates the two cerebellar hemispheres?
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Study Notes
Brain Protection
- The brain is protected by 3 membranes, known as meninges, which are:
- Dura mater
- Arachnoid membrane
- Pia mater
Dura Mater
- The outermost layer, strongest and most external
- Continuous with the periosteum of the cranium
Spaces in Meninges
- Epidural space: located between the dura mater and the cranium
- Subdural space: separates the arachnoid membrane from the dura mater
- Sub-arachnoid space: separates the pia mater from the arachnoid mater, contains cerebrospinal fluid (CSF)
Folds of Dura Mater
- Separates and supports structures of the brain, providing cushioning
- Falx cerebri: separates the cerebral hemispheres
- Tentorium cerebelli: forms a partition between the cerebrum and cerebellum
- Supra/infra tentorial: refers to the regions above/below the tentorium cerebelli
- Tentorial notch: an opening that provides communication between the supra and infra tentorial spaces
- Falx cerebelli: separates the two cerebellar hemispheres
Arachnoid Membrane
- Follows the contour of the dura mater
Pia Mater
- Follows the contour of the brain
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