Which listing uses Inferior PSIS as a contact point?

• A. PI
• B. IN
• C. AS
• D. EX

Answer: (A)

The main idea here is that each innominate listing chooses a specific pelvic landmark as the contact point to deliver the thrust to the intended part of the pelvis. For a posterior-inferior adjustment of the ilium, the inferior PSIS sits at the correct location to reach the posterior-inferior quadrant of the bone. Using that landmark allows the thrust to engage the ilium in the plane and direction needed to correct the posterior-inferior orientation without unduly stressing nearby structures. That’s why the listing associated with this approach uses the inferior PSIS as its contact point. The other patterns would rely on different landmarks that target other parts of the pelvis, so they wouldn’t use the inferior PSIS.