Internal cranium Flashcards

1
Q

What are the 3 layers of protective tissue (meninges)?

A

Duramater
Arachnoid mater
Piamater

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2
Q

What is extradural space?

A

Imaginary space between skull and duramater

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3
Q

What is subdural space?

A

Space between duramater and arachnoidmater

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4
Q

What is subarachnoid space?

A

Space between arachnoidmater and piamater

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5
Q

What is the falx cerebri?

A

Fold on the duramater

descends between the hemsipheres

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6
Q

What is the tentorium cerebelli?

A

Fold of duramater

Between cerebellum and cerebrum

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7
Q

What is found between flax cerebra and the skull?

A

Superior sagittal sinus

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8
Q

What is found between the falx cerebri and tentorium cerebelli?

A

Straight sinus

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9
Q

Tentorium cerebelli is attached to what on the skull?

A

Fo. magnum

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10
Q

What is the function of venous sinus?

A

Drain blood from the brain
Mechanism with emissary veins for maintaining pressure
Cooling mechanism - cools arterial blood

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11
Q

Why are emissary veins required?

A

No muscle in the walls of the sinus so if they fill they burst so blood is diverted to emissary veins to stop this

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12
Q

Of what artery is vertebral artery a branch?

A

Subclavian artery

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13
Q

How does vertebral artery enters the skull?

A

Through fo. transversarium and foramen magnum

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14
Q

Which cranial fossa does vertebral artery supply?

A

Posterior

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15
Q

Of what artery is internal carotid a branch?

A

Common carotid

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16
Q

How does internal carotid enter the skull?

A

Carotid canal

17
Q

Which cranial fossa does internal carotid supply?

A

Middle and anterior cranial fossa

18
Q

What CN are found in anterior cranial fossa?

A

I

19
Q

What CN are found in middle cranial fossa?

A

II, III, IV, V, VI

20
Q

What CN are found in posterior cranial fossa?

A

VII, VIII, IX, X, XI, XII