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25 Cards in this Set
- Front
- Back
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Where does ventricular system come from? |
cavity in neural tube called neural canal |
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what is the choroid plexus |
a plexus in the ventricles that secretes CSF |
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What is the intraventricular foramen? |
cavity between lateral ventricles and third ventricle; contains choroid plexus |
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What is the cerebral aquaduct? |
channel between third ventricle and fourth ventricle; contains CSF, but not choroid plexus; easily blocked |
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What could happen when cerebral aquaduct is blocked during development? |
hydrocephaly, which is when there's a CSF overabundance in lateral ventricles |
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Posterior horn of lateral ventricle goes where? |
occipital lobe |
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Inferior horn of lateral ventricle goes where? |
temporal lobe |
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What follows outline of lateral ventricle? |
caudate nucleus |
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The choroid plexus forms the roof of which ventricles? |
lateral and fourth |
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Openings called Magendie/Luschka form after 2-3 months of development. What is the purpose of these openings? |
to allow communication between 4th ventricle and subarachnoid space |
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Make-up of blood-CSF barrier |
capillary|connective tissue barrier|choroid epithelium |
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Basal lamina |
extracellular matrix secreted by cells |
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What are the meninges? |
membranous coverings that surround the CNS |
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Functions of meninges? |
protect brain and spinal cord; support for arteries, veins, and sinuses; enclose subarachnoid space |
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How does CSF circulate around brain and spinal cord? |
CSF goes out through openings in 4th ventricle, circulates around, and then reenters vascular system through arachnoid villa |
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dura mater outside of brain |
adjacent to skull (no epidural space) |
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dura mater outside of spinal cord |
epidural space |
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arachnoid membrane outside brain |
brain has arachnoid villa that allows CSF to flow to blood |
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arachnoid membrane outside spinal cord |
no arachnoid villa |
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pia mater |
delicate membrane adherent to brain and spinal cord |
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where do the meninges develop from? |
cells from neural crest and mesoderm |
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Faux cerebri |
dura mater that separates hemispheres in central sulcus |
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What is the BBB? |
specializations of the walls of brain capillaries made up of endothelial cells and surrounded by basal lamina |
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Function of BBB |
protects brain from foreign substances in blood maintains a constant environment for brain |
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Circumventricular organs |
pinial body (epithalamus) - melatonin/circadian rhythm area postrema - vomiting center subfornical organ - regulation of body fluids OVLT: chemosensory area median emminence - anterior pituitary hormones |
