Favoritisms and Protection

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Favoritisms and Protection

• CRANIUM
• MENINGES
• BLOOD FLOW
• BBB
• VENTRICULAR SYSTEM

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Skull and dura
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Dura and blood supply
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The cerebroventricular systemventricals and CSF
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From Choroid Plexi of Lateral ventricals to 3rd
ventrivcal..4th ventrical to?
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The central canal of the spinal cord
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Subarachnoid space of meninges surrounding spinal
column..
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Reabsorbed by the Aracnoid Villi mostly along
the Superior Saggittal sinus
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hydrocephaly
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The Blood-Brain Barrier Astrocytes create tight
junctions (barriers) the BBB
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The blood brain barrier A physical barrier
A system of cellular transport Restricts
potentially harmful chemicals from the blood,
but allows the entrance of essential
nutrients.Lipid soluble molecules, such as
ethanol and caffeine are able to penetrate
through the barrier relatively easily.  In
contrast, water soluble molecules are unable
cross the barrier without specialized carrier-
mediated transport mechanisms.The area postrema
and the posterior pituitary area are two regions
lacking this barrier. 
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The BBB

• No Dopamine
• So L-Dopa
• Exception- area postrema

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