PIIN listing uses which PSIS SCP location?

• A. Medial PSIS SCP
• B. Inferior Medial PSIS SCP
• C. Inferior Lateral PSIS SCP
• D. Lateral PSIS SCP

Answer: (B)

The key idea here is choosing the contact point that best positions your hand and vector for targeting the pelvic/sacral area. For the PIIN listing, the Inferior Medial PSIS SCP places the contact just below and toward the midline on the posterior superior iliac spine. That location gives a stable grip over the ilium with a line of drive that effectively engages the sacroiliac region and the pelvic ring, while keeping soft tissue and other structures out of the direct contact zone.

Using this inferior-medial position helps you maintain a solid lever against the bone and delivers the thrust in a direction that aligns with how the pelvic joints move and rotate, which is why it’s chosen for this listing. Other PSIS quadrant locations would alter the angle and contact area, making them less suited for the specific vector and stabilization the PIIN listing requires.