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17 Cards in this Set
- Front
- Back
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Functions of CSF
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1.Bouyancy
2.Protection 3.Environmental Stability 4.Excretion of waste products 5.Endocrine medium for the brain |
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Hydrocephalus
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Excessive CSF
Before sutures close - head enlarges Sutures closed - brain compressed |
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Pia Matter
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Thin layer of areolar tissue follows closely to the brain surface
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Cerebrospinal Fluid
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Clear colorless, circulates ventricles and subaracnoid space(between arachnoid and pia mater)
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Dura Mater
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White(tough) provides mechanical strength. outer most layer that is thick and fibrous, that lines the interior of the skull
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Arachnoid
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middle layer, is extremely thin and loosely encloses the brain
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Gray Matter
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Cell bodies
dendrites axon terminals unmyelinated axons |
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Structures that support the brain
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Bony cranium
meninges CSF and BBB |
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Astrocytes
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• they regulate the neurons and surrounding environment
• they are the rapid response team following injury • regulate the development of scars and neural sprouting • several neurological diseases MS, AIDS, Alheimer’s are all characterized by excessive astroglial scarring |
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Oligodendrocytes
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• found in gray matter and act to myelinate structures within the CNS
• probe to injury and disease, well into your early 20’s |
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Schwann Cells
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• myelinate in the PNS
• regenerate after injury • susceptible to toxic substances and infection |
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Microglia
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• serve as a link between the nervous system and immune system
• they are inactive until the presence of disease and injury • they play phagocytic (cleanse and carries away) role consuming antogens and debris • if to active they are actually toxic to healthy neurons |
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Cerebrospinal Fluid (CSF)
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• aides in protecting / sustaining CNS
• suspect / cushion the skull • transports nutrients / removes metabolic waste • is protein free and has a different composition then plasma • 4 ounces total and entirely replaced 3 – 4 times daily • if it doesn’t flow freely it creates big problems |
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The brain is suspended in CSF – if blood enters CSF it is Toxic
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The brain is suspended in CSF – if blood enters CSF it is Toxic
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The Body is Dynamic – responds to the amount of stress you put it under
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The Body is Dynamic – responds to the amount of stress you put it under
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CSF DISRUPTION can cause
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• Hydrocephalus (pressure)
• Meningitis (infection) |
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White Matter
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Consists of Myelinated axons
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