Sacroiliac Rocking Test

What is the "Sacroiliac Rocking Test" used for?

• Assess the integrity and pain response of the sacroiliac (SI) joint and the sacrotuberous ligament. 
• It helps identify dysfunction or irritation within these structures.

How to perform the "Sacroiliac Rocking Test"?

• The patient lies in a supine position on the examination table.
• The examiner flexes the patient’s hip and knee fully.
• The hip is then adducted toward the midline.
• To perform the maneuver correctly, the knee is moved toward the patient’s opposite shoulder, creating a “rocking” motion at the sacroiliac joint.
• Both the hip and knee should have full range of motion and be free from pathology before performing the test.
• Some authors recommend adding medial rotation of the hip during flexion and adduction to further increase stress on the SI joint.
• During the test, the examiner may palpate the sacrotuberous ligament (located between the sacrum and the ischial tuberosity) to check for tenderness or abnormal tension.

What is the positive result?

• Pain reproduced in the sacroiliac joint region indicates a positive test and suggests sacroiliac joint dysfunction or ligamentous irritation. 
• The test can also produce tenderness along the sacrotuberous ligament if it is inflamed or stressed.