Skull and Cranial Cavity Flashcards

1
Q

What are the 4 projections of the temporal bone?

A

styloid process, mastoid process, zygomatic process, petrous part

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2
Q

What are the sutures of the cranial cavity?

A

sagittal, coronal and lambdoid

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3
Q

What bones is the pterion between?

A

temporal, parietal, frontal, sphenoid

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4
Q

What is the ridge in the ethmoid bone called?

A

crista galli

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5
Q

What is the gap between the greater and lesser wing of sphenoid?

A

superior orbital fissure

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6
Q

Where is the optic canal?

A

between the body of the sphenoid and the lesser wing

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7
Q

What are the 3 foramen in an arc in the middle cranial fossa?

A

foramen rotundum, foramen ovale, foramen spinosum

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8
Q

What is the foramen lacerum?

A

The 6th foramen in the middle cranial fossa - nothing goes through it

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9
Q

What goes through the foramen spinosum?

A

the middle meningeal artery

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10
Q

What are the 4 foramina in the posterior cranial cavity?

A

internal auditory meatus, jugular foramen and hypoglossal canal and the foramen magnum

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11
Q

Where is the internal auditory meatus?

A

in the petrous part of the temporal bone

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12
Q

Where is the jugular foramen?

A

between the petrous part of the temporal bone and the occipital bone

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13
Q

Where is the hypoglossal canal?

A

in the occipital bone

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14
Q

What is the emissary vein?

A

A vein that drains blood from the scalp to the dural sinuses

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15
Q

What is the diploic vein?

A

Drains the diploe (spongy layer) of the skull in to the dural sinuses

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16
Q

What are the attachments of the falx cerebri?

A

crista gali and internal occipital protruberence

17
Q

What is the diaphragma sellae?

A

The dura covering the turkish saddle in the body of the sphenoid

18
Q

What is the falx cerebri?

A

the dural projection in the midline between the hemispheres of the cerebrum

19
Q

What is the tentorium cerebelli?

A

The dural projection between the cerebellum and the cerebrum

20
Q

What is the falx cerebelli?

A

the dural projection in the midline between the hemispheres of the cerebellum

21
Q

What is the superior sagittal sinus?

A

The dural venous sinus at the top of the falx cerebri

22
Q

What is the inferior sagittal sinus?

A

The dural venous sinus at the bottom of the falx cerebri

23
Q

What is the straight sinus?

A

The meeting point of the inferior sagittal sinus and the great cerebral vein

24
Q

What are the transverse sinuses?

A

The dural venous sinuses at the attachment of the tentorium cerebelli

25
Q

What are the sigmoid sinuses?

A

The dural venous sinuses that snake down from the transverse sinuses to the jugular foramen along the edge of the middle cranial fossa

26
Q

What is the cavernous sinus?

A

the dural venous sinuses that are either side of the body of the sphenoid

27
Q

What is the middle meningeal artery a branch of?

A

the maxillary artery

28
Q

When is the middle meningeal artery at risk?

A

in a fracture of the pterion

29
Q

What are the branches of the middle meningeal artery?

A

anterior and posterior