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15 Cards in this Set
- Front
- Back
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What division of the CNS contains the 2 lateral ventricles?
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Telencephalon
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what division of CNS contains the foramen of Monroe?
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It bridges the lateral ventricles and 3rd ventricle, so it runs from telencephalon to diencephalon.
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what cns division contains the 3rd ventricle?
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diencephalon
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what cns division contains the cerebral aqueduct?
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mesencephalon
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what cns division contains the 4th ventricle?
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metencephalon and myelencephalon
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what is CSF made of?
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an ultrafiltrate of blood--contains water, ions, plasma PROs
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what are the functions of CSF?
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Cushions CNS.
lavages the CNS--brings waste material out to blood, maintaining homeostasis. Gives buoyancy to brain. |
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where is CSF found?
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In the ventricular system and the subarachnoid space.
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Briefly describe the choroid plexus structure/function. How do molecules get across the plexus?
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Simple epithelial cells surrounding fenestrated capillaries. Filters blood to make CSF.
-Most substances must be transported across the epithelium; O2/CO2 diffuse |
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Starting with filtration as step 1, list the 6 steps of flow of CSF from lateral ventricles down to the 4th.
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Filtration-lateral ventricles-foramen of Monroe-3rd ventricle-cerebral aqueduct-4th ventricle
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What causes internal hydrocephalus?
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Blockage at the cerebral aqueduct.
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What causes external hydrocephalus?
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Extensive damage to the arachnoid granulations; as in meningitis.
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What are the 4 ways CSF exits the ventricles? Where does it go when it exits?
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Foramen of Magendie, Foramina of Luschka spill into the subarachnoid space of the brain and spinal cord.
Central Canal empties into the core of the spinal cord. |
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How does the CSF get back into the venous system?
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It percolates through the subarachnoid space and is reabsorbed into venous blood via the arachnoid granulations in the superior sagittal sinus.
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Starting with the Lateral ventricles as Step 1, list the 9 steps of flow of CSF, stopping at the Superior Sagittal Sinus as step 9.
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Lateral ventricles-foramen of Monroe-3rd ventricle-cerebral aqueduct-4th ventricle- foramina of Luschka/Magendie/Central canal-Subarachnoid space-arachnoid granulations-superior sagittal sinus.
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