Podcast
Questions and Answers
What are the two layers of the dura mater?
What are the two layers of the dura mater?
What is the function of the filum terminale external?
What is the function of the filum terminale external?
Where is the superior sagittal sinus located?
Where is the superior sagittal sinus located?
What is the name of the dural extension that sits between the two cerebral hemispheres?
What is the name of the dural extension that sits between the two cerebral hemispheres?
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What is the term for the compartment above the tentorium cerebelli?
What is the term for the compartment above the tentorium cerebelli?
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Where does the midbrain pass through?
Where does the midbrain pass through?
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What is the name of the sinus that lies in the junction between the falx cerebri and tentorium cerebelli?
What is the name of the sinus that lies in the junction between the falx cerebri and tentorium cerebelli?
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What is the term for the dural extensions that create compartments within the brain?
What is the term for the dural extensions that create compartments within the brain?
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Study Notes
Dura Mater
- A hard, thick, tough, and inelastic layer with two layers: periosteal and meningeal
- Periosteal layer attaches to the inner surface of the skull
- Meningeal layer attaches to the arachnoid on one side and the periosteal layer on the other
Dural Extensions
- Three main extensions: falx cerebri, tentorium cerebelli, and falx cerebelli
- Falx cerebri: a sickle-shaped extension between the two cerebral hemispheres
- Tentorium cerebelli: a tent-like extension covering the cerebellum
- Falx cerebelli: an extension sitting between the two cerebellar hemispheres
- The midbrain passes through the tentorial notch (opening in the tentorium cerebelli)
Filum Terminale External
- An extension of dura mater that attaches the spinal cord to the coccyx bone for cord stability
Sinuses in Dural Extensions
- Superior sagittal sinus: lies in the attached edge of the falx cerebri
- Inferior sagittal sinus: lies in the free edge of the falx cerebri
- Straight sinus: lies in the junction between the falx cerebri and tentorium cerebelli
- Transverse sinus: lies in the attached edge of the tentorium cerebelli
- Occipital sinus: lies in the falx cerebelli
Dural Reflections and Compartments
- Dural reflections create 'compartments' within the brain
- Supratentorial compartment: above the tentorium cerebelli
- Infratentorial compartment: below the tentorium cerebelli
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Description
Learn about the structure and extensions of the dura mater, the tough and inelastic membrane that surrounds the brain. Explore the periosteal and meningeal layers, as well as the main extensions such as falx cerebri, tentorium cerebelli, and falx cerebelli.
