Exam 2: Vertebral Artery

Question 1

Vertebral artery arises from ____ at level of ___

Answer 1

Subclavian artery; T2

Question 2

Prevertebral part of the artery ascends to

Answer 2

Transverse foramen of C6

Question 3

____ is the primary site of entry in to a transverse foramen

Answer 3

C6

Question 4

Vertebral artery ascends within and through

Answer 4

C6 to C2 transverse foramina

Question 5

In the _________ interspace vertebral artery forms its first _________

Answer 5

Atlanto-axial interspace; compensatory loop

Question 6

At both axis and atlas vertebral artery is

Answer 6

Firmly attached to transverse foramen

Question 7

Purpose of compensatory loops

Answer 7

Compensates for rotational motion of head by stretching 50-67% of its length

Question 8

After forming first compensatory loop vertebral artery exits

Answer 8

Transverse foramen of C1

Question 9

Upon exit at the transverse foramen of C1 vertebral artery forms

Answer 9

Second compensatory loop around the lateral mass

Question 10

The second compensatory loop passes over

Answer 10

Groove for the vertebral artery on posterior arch of atlas

Question 11

As vertebral artery enters vertebral foramen of atlas, adventitia of artery blends with

Answer 11

Dura mater and arachnoid mater

Question 12

In _______ space in vertebral foramen of C1, the artery lies next to ____

Answer 12

Subarachnoid; medulla oblongata

Question 13

Artery passes through __________ to enter the skull

Answer 13

Foramen magnum

Question 14

After entering skull vertebral artery ascends along MO to the

Answer 14

Pontine-medullary junction

Question 15

In the _______ cistern, R and L arteries unite to form ______

Answer 15

Pontine-medullary cistern; basilar artery

Question 16

V1 region of vertebral artery

Answer 16

From subclavian artery origin to C6

Question 17

V2 region of vertebral artery

Answer 17

From C6-C2 transverse foramina

Question 18

V3 region of vertebral artery

Answer 18

From C2 to the foramen magnum

Question 19

V4 region of vertebral artery

Answer 19

From foramen magnum to basilar artery formation

Question 20

In the embryo the vertebral artery first appears at

Answer 20

Day 33 (5th week)

Question 21

In the embryo the vertebral artery is fully developed by

Answer 21

Day 54 (almost 8th week

Question 22

Vertebral arteries supply blood to the

Answer 22

Brain and spinal cord

Question 23

What side artery diameter tends to be greatest

Answer 23

Left side

Question 24

_____ have greater sized arteries

Answer 24

Males

Question 25

Incidence of vertebral artery injury with adjustments

Answer 25

0.0002% (2 per million)

Question 26

Rapid physical exam for testing patency of vertebral artery

Answer 26

Vertebrobasilar artery insufficiency exam

Question 27

In the vertebrobasilar artery insufficiency exam which artery is compromised

Answer 27

The artery that is opposite to the direction of head tilt

Question 28

If improper compensation occurs in the vertebrobasilar artery insufficiency exam what results

Answer 28

Dizziness, vertigo, and other problems when normal position of head and neck are restored