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Neuroanatomy > Meninges, dura mater, reflections and sinuses > Flashcards

Meninges, dura mater, reflections and sinuses Flashcards

1
Q

What are the 3 membranes of connective tissue known as meninges? (outer to inner)

A

Dura mater, arachnoid mater, pia mater

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2
Q

Where does the dura mater attach?

A

The inner surface of the neurocranium in the skull

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3
Q

What separated dura mater from the walls of the vertebral canal?

A

epidural space

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4
Q

What are the 2 layers of the dura mater?

A

1.) Periosteal layer
2.) Meningeal layer

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5
Q

What does the periosteal layer attach to?

A

The inner surface of the cranial cavities

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6
Q

What 2 structures does the meningeal layer separate from the periosteal layer to form?

A

1.) dural reflections
2.) dural sinuses

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7
Q

What do dural reflections form?

A

Incomplete partitions to divide the cranial cavity

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7
Q

What are the 3 dural reflections?

A

1.) Falx cerebri
2.) Tentorium cerebelli
3.) Falx cerebelli

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7
Q

Which dural reflection is sickle shaped?

A

Falx cerebri

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8
Q

Which dural reflection occupies the longitudinal fissure of the cerebrum and partially separates the cerebral hemispheres?

A

Falx cerebri

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8
Q

Which dural reflection is a tent-like horizontal sheet?

A

Tentorium cerebelli

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9
Q

Which dural reflection is a less prominent vertical reflection of the dura?

A

Falx cerebelli

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10
Q

Which dural reflection intervenes horizontally between the cerebellum and occipital lobe of the cerebral hemispheres, diving the cerebrum from the cerebellum?

A

Tentorium cerebelli

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11
Q

Which dural reflection provides a passage for the mid brain?

A

Tentorium cerebelli

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12
Q

Which dural reflection is in the sagittal plane along vermis that partially separates the cerebellar hemispheres?

A

Falx cerebelli

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13
Q

What do dural sinuses do?

A

Channels that drain the venous blood of the brain to the circulatory system

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14
Q

What are the 5 main dura sinuses? Paired or unpaired?

A

1.) cavernous (P)
2.) superior and inferior sagittal (UP)
3.) transverse (UP)
4.) sigmoid (P)
5.) straight (UP)

15
Q

Where are the cavernous sinuses located?

A

middle cranial fossa on either side of the hypophyseal fossa of the sphenoid bone

16
Q

Which sinuses collect the venous blood of the orbital cavity contents?

A

cavernous

17
Q

Where are the superior and inferior sagittal sinuses located?

A

superior and inferior margins of the falx cerebri, respectively

18
Q

What sinus does the straight sinus receive from and which one does it join to?

A

Receives: posterior end of the inferior sagittal sinus
Joins: posterior end of the superior sagittal sinus

19
Q

Which dura sinus is housed in the posterior margin of the tentorium cerebelli?

A

Transverse

20
Q

Where are the sigmoid sinuses located?

A

Groove on the inferior surface of the mastoid process of temporal bones.

21
Q

What sinuses does the transverse receive from?

A

The sup. sagittal and straight

22
Q

Which sinuses receive ALL other dural sinuses (directly and indirectly) and empty into the internal jugular veins?

A

Sigmoid sinuses

23
Q

What vein do the deep veins of the brain receive the majority from? And where does it drain?

A

The great cerebral vein.
Straight sinus.

24
Q

Where are the superficial veins of the brain located?

A

In the subarachnoid space. Between Pia Mater and arachnoid mater

25
Q

Where do the frontal and parietal lobes drain?

A

Superior sagittal sinus

26
Q

Where does blood from the occipital and temporal lobes drain?

A

Right and left transverse sinuses

27
Q

What 2 layers of the cranial dural mater are the dura sinuses located in?

A

Periosteal and meningeal

28
Q

What are the 3 layers of protection of the CNS?

A

1.) Bone
2.) Connective tissues
3.) Fluid

29
Q

What is the space below the dura mater that is only present in pathology?

A

Subdural space

30
Q

What are the 2 names for the small protrusions of arachnoid through the dura mater?

A

arachnoid villi / arachnoid granulations

31
Q

What is the space between the arachnoid mater and the pia mater called?

A

Subarachnoid space

32
Q

Pia mater is tightly adhered to what?

A

neural tissue

33
Q

Which space or layer would you find CSF?

A

Subarachnoid space

34
Q

What do the venous sinuses separate?

A

periosteal dura and meningeal dura

35
Q

Which 3 sinuses drain into the confluence of sinuses?

A

Sup. sag, inf. sag and straight

36
Q

Which sinus is most common for clots and why?

A

Sigmoid, S-shape

36
Q

Is confluence of sinuses in front or back? What about cavernous?

A

Back / front

36
Q

What is the space above the dura mater that is only present in pathology in the brain?

A

Epidural space

37
Q

Pathway of sinuses

A

Sup –> confluence
Inf –> via straight –> conf
Conf –> trans –> sig –> jugular
Cav (from eyes, nose, mouth)

Neuroanatomy (10 decks)

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