The posterior point for which organ is located at PSIS?

• A. Bladder
• B. Thyroid
• C. Adrenal Gland
• D. Prostate

Answer: (D)

Chapman points are used in visceral OMM to map specific organ relationships to surface locations, with both anterior and posterior points for each organ. Posterior points lie on the back and, for pelvic organs, are found in the sacral/iliac region near landmarks like the PSIS. The prostate is a pelvic organ, and its posterior Chapman point is located at the sacral region near the PSIS. That’s why a tenderness or assessment finding at the PSIS area points to the prostate. The other organs have posterior points mapped elsewhere on the back (not at the PSIS), so they don’t align with this landmark.