Cranial Meninges Flashcards

1
Q

How many layers of dura mater are there and what are they called?

A

2:

  • outer endosteal layer
  • inner meningeal layer
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2
Q

What is the outer endosteal layer of the dura?

A

Lines the interior of the scull sending blood vessels and fibrous processes into cranial bones

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3
Q

What is the inner menigeal layer of the dura?

A

Envelopes the CNS - continues down spinal cord as a tube to provide cranial nerves with tubular sheath

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4
Q

What is the falx cerebri?

A

An arched crescent of dura lying in the longitudinal fissure between the cerebral hemispheres

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5
Q

What is the superior sagittal sinus?

A

Where the falx cerebri attaches to the cranium

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6
Q

Where is the inferior sagittal sinus?

A

It is at the free border of the falx cerebri

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7
Q

What are dural folds?

A

Where the inner layer separates from the outer to form blood filled spaces

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8
Q

What are the dural venous sinuses?

A

The blood filled spaces of dural folds

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9
Q

What is the tentorium cerebelli?

A

Dura forming a thick fibrous roof over the posterior cranial fossa and the cerebellum

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10
Q

What are the subarachnoid cisterns?

A

Spaces between the arachnoid and the pia mater filled with CSF

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11
Q

Where is the cerebellomedullary cistern?

A

It lies in the angle formed by the dorsal surface of the medulla and the inferior surface of the cerebellum

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12
Q

Where is the pontine cistern?

A

On the ventral surface of the pons

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13
Q

What is in the interpenduncular cistern?

A

The Circle of Willis

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14
Q

Where is the interpenduncular cistern?

A

Above the pons and below the optic chiasma

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15
Q

What is the foramen of magendie?

A

A midline communication between the IVth ventricle and the subarachnoid space

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16
Q

What is the foramen of luschka?

A

A lateral communication between the IVth ventricle and the subarachnoid space

17
Q

What does the pia mater form part of?

A

The blood brain barrier

18
Q

Where do the arteries lie in on the surface of the brain?

A

The subarachnoid space

19
Q

What does the pia mater act as a barrier between?

A

The blood vessel and the neurological tissue

20
Q

What does the blood brain barrier protect tissues from?

A

Toxic substances

21
Q

Where are the transverse sinuses?

A

They run along the line of attachment of the tentorium cerebelli to the occipital bone

22
Q

Where is the straight sinus?

A

Within the tentorium cerebelli at its attachment to the falx cerebri