Question

how should the right sacral base move during right sacroiliac extension?
a) posterior - inferior
b) posterior - superior
c) anterior - superior
d) anterior - inferior

Explanation:

During right sacroiliac extension, the right sacral base moves in a posterior-inferior direction. This movement aligns with the kinematics of the sacroiliac joint, where extension of the joint on one side results in the sacral base shifting backward and downward on that same side.

Answer:

a) posterior-inferior