The (R) alar ligament limits ____________________ of C1 on C2
a. (R) rotation
b. (L) rotation
c. Extension
d. Both (R) and (L) lateral flexion
ANS: B
The two alar ligaments arise from the axis on either side of the dens and extend laterally and
superiorly to attach to the medial sides of the occipital condyles. The left alar ligament will resist
right rotation, and the right alar ligament resists left rotation.
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