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Midterm anatomy exci 254 > Lecture 7 - Circulation brain > Flashcards

Lecture 7 - Circulation brain Flashcards

1
Q

Arteries of the brain

A

Vertebral aa.
Internal carotid aa.
Middle meningeal aa.

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2
Q

Internal carotid artery enters the skull via ____

A

The carotid canal

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3
Q

Passes ____ and ____ through the cavernous sinus of the sphenoid body

A

anteriorly, medially

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4
Q

Internal carotid aa is a division from what

A

Common carotid artery

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5
Q

Terminal branches of the ICA

A

Anterior cerebral a.

Middle cerebral a.

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6
Q

Pass through the transverse foramina of the first 6 cervical vertebrae

A

Vertebral arteries

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7
Q

VA perforate the ____ and ____ to pass through the _____ _____

A

dura, arachnoid, foramen magnum

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8
Q

VA unite anterior to pons to form what?

A

Basilar artery

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9
Q

Another word for posterior circulation of the brain

A

Vertebrobasilar arterial system

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10
Q

Basilar artery (3 things)

A

Lies close to the base of the skull
Divides into 2 posterior cerebral arteries
These join the ICA via the posterior communicating arteries

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11
Q

Name the cerebral arteries

A

Anterior, middle and posterior cerebral arteries

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12
Q

Ant. cerebral arteries supply?

A

Most of the medial and superior surfaces of the brain and frontal pole

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13
Q

Middle cerebral arteries supply?

A

Lateral surface of the brain and temporal pole

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14
Q

Post. cerebral arteries supply?

A

Inferior surface of the brain and occipital pole

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15
Q

Other name for cerebral arterial cycle

A

Circle of Willis

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16
Q

The circle of Willis is formed by: (5)

A 
Posterior cerebral arteries
Posterior communicating arteries
Internal carotid arteries
Anterior cerebral arteries
Anterior communicating arteries
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17
Q

Principle vessel receiving blood from these venous sinuses

A

Internal jugular vein

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18
Q

If the jugular is occluded, who offers collateral circulation?

A

Angular vein, pterygoid plexus and suboccipital veins

19
Q

Difference between veins and sinus

A 
Veins = ability to change diameter
Sinus = fixed diameter (no muscle layer)
20
Q

Sinus that lies in the superior border of the falx cerebri

A

Superior sagittal sinus

21
Q

Superior sagittal sinus originates at the crista galli and ends near the internal occipital protuberance at the junction of ?? (4)

A

Superior sagittal sinus, straight sinus, occipital sinus, and transverse sinus

22
Q

Name of the junction of the four sinuses

A

Confluence of sinuses

23
Q

Much smaller than the superior sagittal sinus

Runs in the inferior border of the falx cerebri and terminates in the straight sinus

A

Inferior sagittal sinus

24
Q

Straight sinus is formed by the joining of ____ and ____

A

Inferior sagittal sinus and great cerebral vein

25
Q

Runs infero-posteriorly along the line of attachment of the falx cerebri and the tentorium cerebelli
Will join the confluence of sinuses

A

Straight sinus

26
Q

Usually the ____ transverse sinus is larger

A

RIGHT

27
Q

Leaves the confluence of sinuses laterally along the occipital bones and the posteroinferior angles of the parietal bones
Will become the sigmoid sinus as they approach the petrous portion of the temporal bones

A

Transverse sinus

28
Q

Sigmoid sinus (2 things)

A

Follows an S-shaped course in the posterior cranial fossa

Forms deep grooves in the temporal and occipital bones

29
Q

The sigmoid sinus continues inferiorly to the ____ ____ to become the internal jugular vein

A

Jugular foramen

30
Q

Lies in the attached border of the flax cerebelli ending superiorly in the confluence of sinuses
Communicates with the internal vertebral venous plexus

A

Occipital sinus

31
Q

Location of the cavernous sinus

A

Middle cranial fossa

Bilaterally on each side of the sella turcica

32
Q

Extends from the superior orbital fissure anteriorly to the apex of the petrous portion of the temporal bone posteriorly

A

Cavernous sinus

33
Q

The cavernous sinus receives blood from? (4)

A

superior ophthalmic vein
inferior ophthalmic vein
middle cerebral vein
sphenoparietal sinus

34
Q

Content of cavernous sinus

A

Internal carotid artery
Carotid plexus of sympathetic nerves
Abducens nerve (CVI)

35
Q

Ensheathed in lateral wall of cavernous sinus

A

Occulomotor nv. (III)
Trochlear nv. (CIV)
Trigeminal nv. (CV1 and sometimes CV2)

36
Q

Runs from the posterior ends of the veins of the cavernous sinus to the transverse sinus to then curve to the sigmoid sinus
Lies in the anterolateral portion of the tentorium cerebelli
Attaches to the petrous portion of the temporal bone

A

Superior petrosal sinus

37
Q

Also begins at the posterior ends of the veins of the cavernous sinus inferiorly
Runs between the petrous portion of the temporal bones and the basilar portion of the occipital bone

A

Inferior petrosal sinus

38
Q

Drains the lateral cavernous sinus directly into the origin of the IJV

A

Inferior petrosal sinus

39
Q

Basilar plexus

A

Connects inferior petrosal sinus to internal vertebral venous network

40
Q

Emissary veins

A

Connects dural venous sinuses with veins outside the cranium

41
Q

Arachnoid granulation

A

Collection of arachnoid villi
Prolongation of arachnoid that protrude through the meningeal layer of the dura into the dural venous sinuses
Will affect the transfer of CSF to the venous system

42
Q

location of arachnoid granulation

A

Usually found in areas of the superior sagittal sinus and transverse sinus

43
Q

Structurally adapted to transport CSF from the subarachnoid space to the venous system

A

Arachnoid granulation

44
Q

Review the p.44 of ppt

A

Summary of the formation, circulation and absorption of CSF

Midterm anatomy exci 254 (8 decks)

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