Exam 2: Vertebral Artery Flashcards
Vertebral artery arises from ____ at level of ___
Subclavian artery; T2
Prevertebral part of the artery ascends to
Transverse foramen of C6
____ is the primary site of entry in to a transverse foramen
C6
Vertebral artery ascends within and through
C6 to C2 transverse foramina
In the _________ interspace vertebral artery forms its first _________
Atlanto-axial interspace; compensatory loop
At both axis and atlas vertebral artery is
Firmly attached to transverse foramen
Purpose of compensatory loops
Compensates for rotational motion of head by stretching 50-67% of its length
After forming first compensatory loop vertebral artery exits
Transverse foramen of C1
Upon exit at the transverse foramen of C1 vertebral artery forms
Second compensatory loop around the lateral mass
The second compensatory loop passes over
Groove for the vertebral artery on posterior arch of atlas
As vertebral artery enters vertebral foramen of atlas, adventitia of artery blends with
Dura mater and arachnoid mater
In _______ space in vertebral foramen of C1, the artery lies next to ____
Subarachnoid; medulla oblongata
Artery passes through __________ to enter the skull
Foramen magnum
After entering skull vertebral artery ascends along MO to the
Pontine-medullary junction
In the _______ cistern, R and L arteries unite to form ______
Pontine-medullary cistern; basilar artery
V1 region of vertebral artery
From subclavian artery origin to C6
V2 region of vertebral artery
From C6-C2 transverse foramina
V3 region of vertebral artery
From C2 to the foramen magnum
V4 region of vertebral artery
From foramen magnum to basilar artery formation
In the embryo the vertebral artery first appears at
Day 33 (5th week)
In the embryo the vertebral artery is fully developed by
Day 54 (almost 8th week
Vertebral arteries supply blood to the
Brain and spinal cord
What side artery diameter tends to be greatest
Left side
_____ have greater sized arteries
Males
