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6. Neuro > W20/Neuro peer tute > Flashcards

W20/Neuro peer tute Flashcards

1
Q

What are the 3 layers of the meninges?

A

Dura
Arachnoid
Pia

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2
Q

What’s the difference between the cranial and spinal meninges?

A

The cranial dura mater has 2 layers, while the spinal dura mater is only the layer continuous with the inner cranial dura mater layer

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3
Q

Describe some characteristics of the arachnoid layer

A

Thin
Avascular
Spiderweb-like in appearance

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4
Q

What is the fancy name for the outer cranial dural layer?

A

Periosteal layer

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5
Q

What is the fancy name for the inner cranial dural layer?

A

Meningeal layer

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6
Q

Which layer of the dura mater forms the falces?

A

The inner (meningeal) layer

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7
Q

What are the 4 falces?

A

Falx cerebri
Tentorium cerebri
Falx cerebelli
Diaphragma sellae

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8
Q

What are three major types of brain herniations?

A

Subfalcine (aka cingulate)
Transtentorial (aka uncal)
Tonsillar

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9
Q

Which herniation is the most common

A

Subfalcine

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10
Q

Which herniation is common in sub-arachnoid bleeds?

A

Transtentorial

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11
Q

Which herniation is most dangerous?

A

Tonsillar

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12
Q

How does CSF get back into the venous system?

A

Via the arachnoid granules (/villi) that project into the sinuses

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13
Q

Which meningeal space has the CSF?

A

Subarachnoid

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14
Q

Which meningeal spaces are potential spaces only?

A

Eipdural (except in spine - it’s an actual space)

Subdural

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15
Q

What are the ridges of the cerebrum called?

A

Gyri

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16
Q

What are the grooves of the cerebrum called?

A

Sulci

17
Q

Which fissure divides the L and R cerebral hemispheres?

A

Superior sagittal fissure

aka longitudinal fissure

18
Q

Which fissure separates the frontal from the temporal lobe?

A

Lateral fissure

aka Sylvian fissure

19
Q

Which fissure separates the frontal and parietal lobes?

A

Central sulcus

20
Q

What is the post-central gyrus for?

A

Sensation

21
Q

What is the pre-central gyrus for?

A

Motor control

22
Q

What is the huge bundle of axons that joins the R and L hemispheres called?

A

The corpus callosum

23
Q

What is the Monro Kelly doctrine?

A

The cranial cavity is a closed box, so its volume is constant, and composed of brain, CSF, blood

24
Q

What equation illustrates the Monro Kelly doctrine?

A

Vcc = Vbrain + Vcsf + Vblood

25
Q

What is normal ICP?

A

1-15 mmHg

26
Q

What ICP constitutes a medical emergency?

A

> 25 mmHg

6. Neuro (33 decks)

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