Term
| What are the 3 layers of the meninges? |
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Definition
1. Dura
2. Arachnoid
3. Pia |
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Term
| What are the two layers of the Dura mater, and which of the two is a part of the Falx cerebri? |
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Definition
1. Periosteal
2. Meningeal
The meningeal layer is a part of the falx cerebri |
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Term
| What does the falx cerebri divide? |
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Definition
| The two cerebral hemispheres |
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Term
| What structure forms between the periosteal and the meningeal layers at the falx cerebri and what role does it play? |
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Definition
1. Superior sagittal sinus
2. It allows CSF to drain through the arachnoid mater and returns it to the venous circulation |
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Term
| What is the tentorum cerebelli and what does it do? |
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Definition
| Its a part of the dura mater that separates the cerebellum from the inferior portion of the occipital lobes. |
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Term
| What are the 3 meningeal spaces? |
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Definition
1. Epidural space - between bone and dura
2. Subdural space - between dura and arachnoid
3. Subarachnoid space - between arachnoid and pia |
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Term
| What are the 2 types of hematomas and which one usually accompanies more serious injuries? |
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Definition
1. Epidural and Subdural
2. Subdural usually is more serious, corresponds to the shaking of the brain inside the skull as opposed to a blow to the skull |
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Term
| How many ventricles are there? |
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Definition
4
2x lateral
1x third
1x fourth |
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Term
| What is made in the ventricles of the brain? |
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Definition
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Term
What brain region borders the following:
1. Ventricle 3
2. Cerebral aqueduct
3. Ventricle 4
4. lateral ventricles |
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Definition
1. Diencephalon
2. Midbrain
3. pons, medulla, cerebellum
4. cerebrum |
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Term
| What is the role of the choroid plexus? |
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Definition
| To make CSF in the ventricles |
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Term
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Definition
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Term
| What cellular structure provide the BBB with its ability to prevent diffusion of large molecules, toxins, pathogens, etc. |
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Definition
| Tight junctions in the endothelial cells prevents the passage of molecules through the endothelia. They must instead pass through the cell membranes themselves, either by specialized transporters or diffusion through the cell. |
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Term
| What glial cell type is attached to the BBB endothelial cells that plays a major role in the selectivity? |
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Definition
| Astrocytes. They release cytokines that play an active role in the BBB |
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Term
| What are some of the downsides of the BBB? |
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Definition
1. It can obstruct drug delivery
2. Its not an absolute barrier (nicotine, alcohol, etc. can pass it)
3. It can be compromised by trauma allowing passage of bad cells and compounds into the brain |
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Term
| What are the 8 major arteries that comprise the blood supply to the brain |
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Definition
1. Anterior cerebral
2. Anterior communicating
3. Internal corotid
4. Middle cerebral
5. Posterior communicating
6. Posterior cerebral
7. Basilar artery
8. vertebral arteries |
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Term
| At what part of the brain do the vertebral arteries combine to form the basilar arter? |
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Definition
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