Which statement correctly matches the role of S2 tubercle in Thompson sacral check?

Which statement correctly matches the role of S2 tubercle in Thompson sacral check?

• A. It is the SCP
• B. It is the CH
• C. It is the PP
• D. It is the DS

Answer: (A)

In this check, you need a fixed contact point on the sacrum to sense how it moves. The S2 tubercle serves as the Sacral Contact Point (SCP). It’s a prominent, reliable landmark on the posterior sacrum that you press with a consistent surface so you can monitor the sacral base and sulci as the pelvis or sacrum is gently worked. Because this point stays aligned with the sacral axis, it lets you detect torsions or other sacral motion discrepancies by comparing how the sacrum moves around that fixed reference. That’s why identifying the S2 tubercle as the SCP is the correct match. The other terms describe different roles or components in palpation outside this specific check, so they don’t apply to the function of S2 here.

In this check, you need a fixed contact point on the sacrum to sense how it moves. The S2 tubercle serves as the Sacral Contact Point (SCP). It’s a prominent, reliable landmark on the posterior sacrum that you press with a consistent surface so you can monitor the sacral base and sulci as the pelvis or sacrum is gently worked. Because this point stays aligned with the sacral axis, it lets you detect torsions or other sacral motion discrepancies by comparing how the sacrum moves around that fixed reference. That’s why identifying the S2 tubercle as the SCP is the correct match. The other terms describe different roles or components in palpation outside this specific check, so they don’t apply to the function of S2 here.