Upper Cervical Spine Flashcards
(44 cards)
What feature is unique to the cervical vertebrae?
Transverse foramina
What passes through the transverse foramina?
Vertebral arteries
How many cervical vertebrae are there?
7
Which cervical vertebrae are “typical”?
C3-C6
What is another name for C1?
Atlas
What is another name for C2?
Axis
What is the primary function of the atlas?
Hold up the head
What arthrokinematic rule holds true for the AO joint?
Convex on concave
In the spine, when we discuss movements, we refer to the (1) superior/inferior vertebrae moving on the (2) superior/inferior vertebrae.
(1) Superior
(2) Inferior
What joins the 2 lateral masses of the atlas?
Anterior and posterior arches
What is the orientation of the inferior articular facet of the atlas?
Sloped downwards by 20º
What does the inferior facet of the atlas articulate with?
The superior articular facet of C2
What is the orientation of the superior articular facet of the axis?
20º below the horizontal plane
What is the shape of the superior articular facet of the axis?
Slightly convex
What is the arthrokinematic rule at the AO joint?
Convex on concave
What is the primary movement at the AO joint?
Flexion/extension
Do we have more flexion or extension at the AO joint?
Extension
What is the arthrokinematic rule at the AA joint?
SLIGHTLY concave on convex
What is the primary movement at the AA joint?
Rotation
What articulates with the anterior arch of the atlas?
Dens of the axis
How much of the rotation in the cervical spine comes from the AA joint?
50%
What are the arthrokinematics of cervical right lateral flexion at the AO joint?
Right roll
Left slide
What is spinal coupling?
One motion around one plane is associated with another motion around a different plane
What is the spinal coupled motion hat occurs during right lateral flexion?
Left rotation