Neuro: week 10 : Supporting the brain

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What are the meninges?
Layers of tough connective tissue encasing the NS
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What meninges layer clings to the surface of the brain and spinal cord?
Pia mater
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What is the subarachnoid space?
Fluid filled space between arachnoid membrane and Pia mater
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What is the meninges that is tough and flexible but not stretchable?
Dura mater
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What stops brain displacement?
The dura mater
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What is impermeable to fluid and stops CSF leakage?
Arachnoid membrane
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What is meningitis?
The inflammation of the meninges caused by infection via viruses or bacteria.
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What test is used to reveal meningitis?
Lumbar puncture
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What will a positive result of meningitis reveal via a lumbar puncture?
Cloudy cerebrospinal fluid
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What are ventricles?
Hollow spaces within the brain, filled with cerebrospinal fluid
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What is sited in the centre of the telencephalon and is the largest of its sort?
Lateral ventricles
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Where is the 3rd ventricle located?
At the midline in the centre of the diencephalon
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What connects the 3rd and 4th ventricle?
Cerebral aqueduct
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What ventricle is found between the cerebellum and the pons?
4th ventricle
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Which ventricle is located in the telencephalon?
Lateral ventricle
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Where is the cerebrospinal fluid constantly produced from?
Choroid plexus
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What is the half life ( time taken for half to be replaced) of CSF?
~ 3 hours
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What is the ventricle in which chloride plexus that produces the CSF ?
Lateral ventricle
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What order does the CSF flow when it is produced?
Lateral > 3rd ventricle > 4th ventricle > subarachnoid space > bloodstream
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What are the 4 vital functions of CSF?
Protection, Buoyancy, Waste reduction, Transport
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What is hydrocephalus also known as?
Water on the brain
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Why does hydrocephalus occur?
Due to excess CSF in ventricles, i.e. drainage blocked
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What is the treatment for hydrocephalus?
Shunt insertion
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What are supporting cells also known as?
Glial cells
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What is amyotrophic lateral sclerosis also known as?
Lou Gehrig Disease
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What is the most common form of motor neurone disease?
ALS
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What are microglial?
Smallest glial cells that protect the brain from invading microorganisms
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What is the blood brain barrier?
A semi-permeable barrier between blood and brain
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What are the capillaries lined with?
Endothelial cells
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What allows substances to move across capillary walls?
The small spaces between each endothelial cell.
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Why in the brain do no spaces exist between endothelial cells?
So substances cannot pass over the capillary wall (BBB)
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What molecules CANNOT pass through BBB and how?
Large molecules via carbohydrates enzymes.
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Other cards in this set

Card 2

Front

What meninges layer clings to the surface of the brain and spinal cord?

Back

Pia mater

Card 3

Front

What is the subarachnoid space?

Back

Preview of the front of card 3

Card 4

Front

What is the meninges that is tough and flexible but not stretchable?

Back

Preview of the front of card 4

Card 5

Front

What stops brain displacement?

Back

Preview of the front of card 5
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