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28 Cards in this Set
- Front
- Back
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What are the two layers of the dura mater?
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external dura/endosteum
internal dura/meningeal |
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Where are the blood vessels that get ruptured during a subdural hematoma located?
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between the two dural layers
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What are the three functions of the endosteal/external layer of dura?
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1)blood vessels and nerves
2) cranial periosteum 3) external layer provides sheaths for cranial nerves as they exit foramina |
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What are the four processes of the internal layer of dura/meningeal layer?
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1) falx cerebri
2) tentorium cerebellae 3) diapraghma sellae 4) falx cerebelli |
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What structure provides the vasculature to the cranial dura?
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middle meningeal artery
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What are the two nerves that innervate the cranial dura?
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1) trigeminal
2) vagus and first three cervical nerves |
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What layer of the cranial dura is continous with the spinal dura?
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the inner layer
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Does the arachnoid mater dip into the meninges?
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no
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What is the subarachnoid space?
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CSF
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What connects the subarachnoids pace with the ventricular compartments?
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foramen of magendie and lushka in fourth ventricle
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What are the subarachnoid cisterns?
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places where arachnoid mater is seperated from pia later
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How does CSF get into venous blood
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by arachniod granulations
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What are the two layers of the pia mater?
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1)inner intimal
2) outer epipal |
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How does blood get into CSF?
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from vessels in epipal layer of pia mater
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Does pia mater dip into sulci?
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yes
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What structure provides communication between the two lateral ventricles and third ventricle??
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foramina of monroe
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What is the ventricular lining?
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ependymal cells/modified glial cells
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Are there tight junctions between the ependymal cells?
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no
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What is a choroid plexus?
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a structure that consist of choridal epithelial cells around a capillary bed
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Are the choridal epithelial cells lined by tight junction?
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yes
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How do the choroidal epithelial cells control CSF composition?
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drive Na into CSF
drive K into epithelial cell allow Bicarb and Cl into CSF drive H and K into cell ==> ultimately drive water into cell |
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How is CSF drained?
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1) lateral ventricles
2) foramen of monroe 3) third ventricle 4) cerebral aqueduct 5) fourth ventricle 6) foramen of magendie and luschka 7) subarachnoid space at brain stem 8)up to arachnoid granulations 9)superior saggital sinus |
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What happens if venous pressure rises?
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CSF outflow ↓
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What are the three key characteristics of CSF composition?
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1)NaCl solution
2) low in protein 3) acellular |
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What disease state do you have if you have RBC in CSF?
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subarachniod hemmorhage from ruptured anuerysm
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What disease state is associated with WBC in CSF?
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bacterial or fungal meningitis
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What disease state is associated with decreased glucose in CSF?
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bacterial or fungal meningitis
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What disease state is associated with IgG
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multiple sclerosis
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