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30 Cards in this Set
- Front
- Back
Hypothesis that states that the cranial compartment is incompressible, and volume inside is fixed |
Monro-Kelly |
|
Constituents of cranium |
Blood, CSF, tissue |
|
Volume of CSF in cranium |
8% |
|
Volume of blood in cranium |
12% |
|
Volume of brain in cranium |
80% |
|
ICP is _____ CSF pressure |
Supratentorial |
|
ICP is measured in the _______ or over the ____ |
Lateral ventricles; cerebral cortex |
|
Small increases in volume in one component of cranium are initially well |
Compensated |
|
Infants: cranial decompression may occur via expansion of the |
Skull |
|
Posterior fontanelle closes by |
2 months |
|
Anterior fontanelle remains open until |
1-2 y/o |
|
Cranial sutures fuse as late as |
10 y/o |
|
Junction between vascular endothelial cells that are nearly fused |
BBB |
|
BBB is a ____ barries |
Lipid |
|
Can pass freely through BBB |
CO2 |
|
Can pass freely through BBB |
O2 |
|
Can pass freely through BBB |
Lipid soluble molecules |
|
Poor penetration through BBB |
Ions |
|
Poor penetration through BBB |
Proteins |
|
Poor penetration through BBB |
Large molecules such as mannitol |
|
BBB can be disrupted by |
Severe HTN |
|
BBB can be disrupted by |
Tumors |
|
BBB can be disrupted by |
Trauma |
|
BBB can be disrupted by |
CVA |
|
BBB can be disrupted by |
Infection |
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BBB can be disrupted by |
Marked hypercapnia |
|
BBB can be disrupted by |
Hypoxia |
|
BBB can be disrupted by |
Sustained seizure activity |
|
Protects the CNS from trauma |
CSF |
|
Adults produce ____ CSF |
21 mL/hr, 500 mL/day, 150 mL circulating |