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Neuroanatomy Exam 1 > Meninges, Ventricles, and CSF > Flashcards

Meninges, Ventricles, and CSF Flashcards

1
Q

Meningeal Coverings

A

Dura Mater
Arachnoid Mater
Pia Mater

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2
Q

Dura Mater

A

2 layers (periosteal and meningeal)
Spaces (epidural and subdural)
Dural Reflections
Dural venous sinuses

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3
Q

Arachnoid Mater

A

Arachnoid trabeculae
Subarachnoid space
- Subarachnod cisterns
- Arachnoid villi (granulations)

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4
Q

Dura Mater - Subdural and Epidural Spaces

A

Potential spaces

can bleed into these and will be “eipdural hematoma” or “subdural”

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5
Q

Arachnoid Mater - Subarachnoid Space

A

Real space

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6
Q

Subdural Hematoma

A

Crescent moon shape
Will not extend into the other hemisphere
Falx Cerebri is sitting there and prevents it from doing so

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7
Q

Epidural Hematoma

A

Will bleed into other hemisphere

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8
Q

Falx Cerebri

A

Btw the two hemispheres

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9
Q

Tentorium Cerebelli

A

Covers the cerebellum

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10
Q

Falx Cerebelli

A

Btw the two cerebellar hemispheres

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11
Q

Purpose of dural reflections

A

they hold the venous system, prevent some movement, and separate things out
Help maintain and protect system - allows some openings

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12
Q

Sinuses

A 
Superior sagittal sinus
Inferior sagittal sinus
Straight sinus
Transverse sinus
Sigmoid sinus
Confluence of sinuses
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13
Q

Sinuses go out the…

A

jugular foramen

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14
Q

Arachnoid Mater - Arachnoid Trabeculae

A

Mater overlies the brain and does NOT enter the sulci

Trabeculae

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15
Q

Subarachnoid Space

A

Actual fluid-filled space

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16
Q

Subarachnoid Cisterns

A

Little space/indentation or pouches

Named for location

17
Q

4 cisterns

A
  1. Superior Cistern (cistern of great cerebral vein) - good to drain here
  2. Interpeduncular Cistern
  3. Pontine Cistern
  4. Cisterna Magna (cerebellomeduallary)
18
Q

Arachnoid Villi (granulations)

A

Helps us remove excess CSF and get it back into venous circulation
If stopped this system we would have a build up of CSF

19
Q

Pia Mater

A

Very closely invested to surface of brain and into each and every sulcus

20
Q

Ventricles

A

2 lateral ventricles
third ventricle
fourth ventricle

21
Q

Lateral Ventricles

A

C-shaped course through all the lobes of the cerebral hemispheres
Interventricular foramen —> 3rd

22
Q

Third Ventricle

A 
Located in the midline region of diencephalon
Cerebral aqueduct (in midbrain) --> 4th
23
Q

Fourth Ventricle

A

Btw cerebellum post and pons and rostral medulla
Median aperture
Lateral aperture

24
Q

Parts of the lateral ventricle

A 
Frontal horn
Body
Occipital horn
Atrium (trigone - junction)
Termoral horn (inf)
Intercentricular foramen
25
Q

NO choroid plexus

A

in cerebral aqueduct

26
Q

Third Ventricle - cerebral aqueduct

A

Narrowest portion of this system

do NOT want choroid plexus here - would lead to brain squishing up to the skull

27
Q

Fourth Ventricle - parts

A 
Median Aperture (Magendie)
Lateral Aperture (Luschka) 
Continuous with the central canal of spinal cord
28
Q

CSF - formed by..

A

Choroid plexus - highly convoluted and vascular membranous material that produces and secretes CSF

29
Q

Function of CSF

A

Supportive
Control of extracellular fluid
Provides a route for neuroactive hormones

30
Q

Which arteries supply the choroid plexus

A

Anterior and Posterior Choroidal arteries

31
Q

How choroid plexus works…

A

we do not want RBCs in the CSF so we filtrate them out

Capillaries keep RBCs then CSF continues through pia mater and through the choroid epithelium –> CSF

32
Q

Choroid plexus found in

A

all of the ventricles

33
Q

BBB

A

Anatomical and physiological complex that controls movememnt of substances from general extracellular fluid of the body to the extracellular fluid
Very picky - only wants glucose and oxygen

34
Q

Structure of the BBB

A
  1. Blood arachnoid layer
  2. Blood CSF layer
  3. True BBB - tight junctions of the endothelial cells of the cerebral capillaries
35
Q

True BBB

A

Astrocyte - control access to the neurons

BBB is the sequence of the 3 though

Neuroanatomy Exam 1 (9 decks)

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