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Anatomy 2 > Meninges and Venous Sinuses > Flashcards

Meninges and Venous Sinuses Flashcards

1
Q

What are 3 layers of the meninges?

A
  1. Dura
  2. Arachnoid
  3. Pia
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2
Q

How does the cranial dura differ from the spinal dura?

A

Cranial dura is double layered

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3
Q

What are the 2 layers of cranial dura?

A
  1. Periosteal

2. Meningeal

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4
Q

What vein is found at the top of the longitudinal fissure?

A

Superior sagittal sinus

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5
Q

How many folds of dura are there in the cranial cavity?

A

4

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6
Q

What are the 2 vertical dural folds found in the cranial cavity?

A
  1. Falx cerebri

2. Falx cerebelli

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7
Q

What are the 2 horizontal dural folds found in the cranial cavity?

A
  1. Tentorium cerebelli

2. Diaphragma sellae

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8
Q

What is the primary function of the dural partitions?

A

Restrict rotatory displacement of the brain

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9
Q

Where is the falx cerebri found?

A

Between cerebral hemispheres

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10
Q

What are the 2 anterior attachments of the falx cerebri?

A
  1. Frontal crest

2. Superior sagittal sulcus

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11
Q

What are the 2 posterior attachments of the falx cerebri?

A
  1. Internal occipital protuberance

2. Tentorium cerebelli

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12
Q

Where is the superior sagittal sinus found?

A

Upper margin of the falx cerebri

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13
Q

Describe the 5 stages of blood flow from the superior sagittal sinus until it leaves the skull

A
  1. Superior sagittal sinus
  2. Confluence of sinuses
  3. Right transverse sinus
  4. Right sigmoid sinus
  5. Right internal jugular vein (leaves via jugular foramen)
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14
Q

Where is the inferior sagittal sinus found?

A

Lower margin of the falx cerebri

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15
Q

Describe the 5 stages of blood flow from the inferior sagittal sinus until it leaves the skull

A
  1. Superior sagittal sinus
  2. Straight sinus
  3. Confluence of sinuses
  4. Left transverse sinus
  5. Left sigmoid sinus
  6. Left internal jugular vein (leaves via jugular foramen)
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16
Q

Where is the tentorium cerebelli found?

A

Between the cerebellum and cerebrum

17
Q

What are the 4 posterior attachments of the tentorium cerebelli?

A
  1. Internal occipital protuberance
  2. Margins of transverse sulcus
  3. Margins of superior petrosal sulcus
  4. Posterior clinoid process
18
Q

What is the anterior attachment of tentorium cerebelli?

A

Anterior clinoid process on both sides

19
Q

What gland does the diaphragma sellae cover?

A

Pituitary gland

20
Q

Name the 4 attachments of the diaphragma sellae

A
  1. Two anterior clinoid processes

2. Two posterior clinoid processes

21
Q

What shape is the falx cerebelli?

A

Crescent shaped

22
Q

What shape is the falx cerebri?

A

Sickle shaped

23
Q

Where is the sphenoparietal sinus found?

A

Lesser wing of sphenoid bone

24
Q

Where is the cavernous sinus found?

A

It lies on either side of the sella turcica

25
Q

What 4 things drain into the cavernous sinus?

A
  1. Superior ophthalmic vein
  2. Inferior ophthalmic vein
  3. Cerebral veins
  4. Sphenoparietal sinus
26
Q

Where does the cavernous sinus empty?

A

Superior and inferior petrosal sinuses

27
Q

What are arachnoid granulations?

A

Small extensions which protrude into superior sagittal sinus

28
Q

What is the function of arachnoid granulations?

A

Allow CSF to leak through and enter superior sagittal sinus

29
Q

Where does the inferior sagittal sinus begin?

A

Anteriorly in the region of crista galli

30
Q

What are 4 signs of a patient having a cavernous sinus thrombosis?

A
  1. Fever
  2. Ptosis
  3. Proptosis
  4. Ophthalmoplegia
31
Q

Where does the transverse sinus pass?

A

Attached base of tentorium cerebelli

32
Q

Where does the transverse sinus become the sigmoid sinus?

A

Base of the petrous ridge

33
Q

Where does the superior petrosal sinus empty?

A

Sigmoid sinus

34
Q

Where does the inferior petrosal sinus empty?

A

Directly into the internal jugular vein

35
Q

Where is the basilar sinus found?

A

Below the dura of the clivus

36
Q

From what 2 sinuses does the basilar sinus receive blood?

A
  1. Cavernous sinus

2. Inferior petrosal sinus

37
Q

Where does the basilar sinus empty?

A

Vertebral plexus of veins through foramen magnum

Anatomy 2 (24 decks)

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