Neuroanatomy - Meninges
11 important questions on Neuroanatomy - Meninges
The CNS is wrapped in meninges (connective tissue sheets), how many and what are their names?
The dura mater, follows the contours of the bony surround and is very hard and stiff.
The arachnoid membrane, which is very soft.
The pia mater, which follows the contours of the CNS and is also very soft.
How are the arachnoidea and pia mater together called?
Which spaces are between the mininges? (meningual spaces)
- Epidural space between the bone and dura mater. This space is virtual, but can become real under extreme circumstances (lesion)
- Subdural space between the dura mater and arachnoid membrane. This space is virtual
- Subarachnoid space (present all the time) between the arachnoid space and the pia mater. Blood vessels are located in this space
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What is the function of the subarachnoid space
What keeps the spinal cord in the middle of the spinal cavity?
Inside the skull, the dura mater consists of two layers, which two?
2. Meningeal layer - dura mater proper
What are dural duplicatures?
Which dural duplicatures excist?
2. Tentorium cerebelli - between the cerebrum and cerebellum. Prevents the cerebrum to lower
What are the three levels/floors of the skull?
Middle cranial fossae
Posterior cranial fossae
Inside the dural duplicatures are venous collectors located, how are they named?
Which big sinuses excist?
The blood in the inferior and superior sagittal sinus flows to the confluence sinuum (junction between inferior and superior). From their, the blood flows in one of the two transverse sinuses. From the transverse sinus it flows into the sigmoid sinus and then into the jugular vein.
So, there are two transverse, sigmoid sinuses and two jugular veins.
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