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Spinal Anatomy > Vasculature of the Spine (Quiz 2) > Flashcards

Vasculature of the Spine (Quiz 2) Flashcards

1
Q

The spinal cord is supplied by ______________ arteries and 3 longitudinal arteries

A

segmental

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2
Q

The spinal cord is supplied by segmental arteries and 3 longitudinal arteries. What are the 3 longitudinal arteries?

A

one anterior spinal artery and 2 posterior spinal arteries

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3
Q

What are the segmental arteries called that arise off the subclavian arteries in the cervical region?

A

-vertebral arteries
-ascending cervical arteries
-deep cervical arteries

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4
Q

What are the segmental arteries called that arise directly off the aorta in the THORACIC region?

A

posterior intercostal arteries

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5
Q

What are the segmental arteries called that arise directly off the aorta in the LUMBAR region?

A

lumbar arteries

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6
Q

What are the segmental arteries called that arise directly off the aorta in the SACRAL region?

A

lateral sacral arteries

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7
Q

One anterior spinal artery and two posterior spinal arteries run down the spinal cord from the _____________________ to the __________________

A

medulla oblongata, conus medullaris

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8
Q

The longitudinal arteries provide blood directly to the spinal cord and are formed by branches of the vertebral artery. The posterior spinal arteries (2/3 of the longitudinal arteries) can also arise from the….

A

posterior inferior cerebellar artery

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9
Q

The anterior spinal artery runs inferiorly in the _________________ fissure and gives rise to ___________ arteries

A

anterior median, sulcal

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10
Q

Which artery provides the major blood supply directly to the spinal cord (supplies approx. 2/3 of the cross-sectional area of the spinal cord)?

test q

A

anterior spinal artery

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11
Q

Spinal branches arise off ______________ arteries and follow spinal nerves through the IVF

A

segmental

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12
Q

Spinal branches bifurcate into….

A

-anterior and posterior segmental medullary arteries
-anterior and posterior radicular arteries

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13
Q

Where do the anterior and posterior segmental medullary arteries feed into?

A

anterior longitudinal artery

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14
Q

Anterior and posterior spinal arteries can supply only the ____________ part of the spinal cord by themselves

A

short superior

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15
Q

Blood circulation to much of the spinal cord depends on which arteries?

A

segmental medullary arteries

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16
Q

Anterior and posterior medullary arteries arise off the spinal branches of major cervical and segmental arteries to merge with the….

A

longitudinal spinal arteries

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17
Q

Anterior and posterior medullary arteries feed/bring/supply blood to which arteries?

test q

A

spinal arteries

18
Q

What is the blood flow pathway for anterior and posterior medullary arteries?

test q

A

segmental a. > spinal branch > anterior and posterior medullary aa. > spinal aa.

19
Q

What is the blood flow pathway for anterior and posterior radicular arteries?

test q

A

segmental a. > spinal branch > anterior and posterior radicular aa.

20
Q

Anterior and posterior radicular arteries arise off of spinal branches of major cervical and segmental arteries. Where do they supply blood to?

test q

A

anterior and posterior spinal nerve roots and their coverings

21
Q

What is the largest anterior segmental medullary artery called?

A

great anterior segmental medullary artery of Adamkiewicz

22
Q

Where is the great anterior segmental medullary artery of Adamkiewicz located?

A

anterior aspect of the lumbosacral cord enlargement (on the left side for 65% of people)

23
Q

Which artery reinforces circulation to 2/3rd of the spinal cord?

A

great anterior segmental medullary artery of Adamkiewicz

24
Q

Where does the great anterior segmental medullary artery of Adamkiewicz typically arise from?

A

spinal branches of
-inferior posterior intercostal arteries OR
-upper lumbar segmental arteries

25
Q

The segmental arteries send equatorial and periosteal branches to supply the….

A

vertebral body

26
Q

The anterior vertebral canal branches send nutrient arteries to supply….

test q

A

red marrow of vertebral bodies

27
Q

Posterior branches of segmental arteries send _____________ and ___________ arteries to supply the vertebral arch structures

A

periosteal, nutrient

28
Q

T/F: venous drainage parallels the arterial supply

A

true

29
Q

T/F: spinal veins run longitudinally down the length of the spinal cord following the spinal arteries

A

true

30
Q

How many spinal veins are there?

A

-3 anterior spinal veins
-3 posterior spinal veins

31
Q

What do the veins of the spinal cord form?

A

venous plexuses

32
Q

What are spinal veins drained by?

A

medullary and radicular veins (approx 12 veins)

33
Q

How many spinal venous plexuses are there? What are they?

A

4
-2 internal vertebral venous plexuses (anterior and posterior)
-2 external vertebral venous plexuses (anterior aspect of vertebral bodies and posterior aspect of spinous processes)

34
Q

All 4 spinal venous plexuses communicate with each other through the…

A

intervertebral foramina

35
Q

Where do the basivertebral veins form within?

A

vertebral bodies (mostly posterior)

36
Q

What do basivertebral veins drain?

A

vertebral bodies, NOT the spinal cord

37
Q

Where do basivertebral veins drain into?

A

either
-anterior internal venous plexus (mostly)
-anterior external venous plexus

38
Q

Intervertebral veins travel through the IVF with spinal nerves and spinal branches of ____________ arteries

A

segmental

39
Q

Where do intervertebral veins receive venous blood from?

A

spinal cord veins and vertebral venous plexuses, specifically:
-anterior and posterior medullary and radicular veins
-all vertebral venous plexuses

40
Q

Where do intervertebral veins drain into?

A

-vertebral veins of the neck
-segmental veins of the trunk

41
Q

What is the venous pathway of the spine?

A

spinal veins, venous plexuses, medullary veins, and radicular veins drain into > intervertebral veins> segemental veins > vena cava

Spinal Anatomy (12 decks)

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